Support. Studies of bandwidth: Some Types of evidence to consider: Studies of bandwidth: Stelmachowicz et al 2004
|
|
- Jasper Mason
- 5 years ago
- Views:
Transcription
1 Support Fitting Frequency Compression Hearing Aids: A review of current evidence Presenter: Collaborator: Susan Scollie Danielle Glista This work was supported by: Canadian Institutes of Health Research, National Science and Engineering Research Council, Masons Help-2-Hear Foundation and Phonak AG Special thanks to: Richard Seewald, Vijay Parsa, Melissa Polonenko, Marlene Bagatto, and Jacob Sulkers for their contributions Some Types of evidence to consider: Studies of bandwidth: Does it matter if we provide audibility of high frequency speech cues to children who use hearing aids? Are we providing these cues? Electroacoustic information: What is the signal processor doing to speech? Can we measure that? Behavioural studies of outcome: Is there benefit when we apply this processing strategy? Studies of bandwidth: Recent studies (many by Stelmachowicz, Pittman, Moeller): Children who have hearing loss need greater access to the high frequency cues of speech to recognize and learn speech sounds as well as their normally hearing peers. High frequency speech sounds appear to be delayed in the early phonemes produced by children who use hearing aids. The authors speculated that the bandwidth of typical hearing aids may not reach the spectral energy present in many fricatives. Studies of bandwidth: Stelmachowicz et al 24 Female & child s versus male s Studies of bandwidth: Stelmachowicz et al 21 NH listeners: Hz seems adequate. HI listeners: more than a Hz bandwidth was needed in this study. 1
2 Studies of bandwidth: Pittman 28 Faster word learning with extended bandwidths. Hz versus 9 Hz, using lab equipment. Clinical rationale for frequency lowering: Bandwidth matters: Children need access to the high frequency sounds of speech, to understand and monitor: See: Moeller et al, 27, a review article by Stelmachowicz et al (24), Pittman 28, and various other studies I`ve only mentioned a few here. But: If audibility cannot be providedvia the available bandwidth and gain/output, is it beneficial to lower the cues to an audible frequency range? Bandwidth limitations for severe losses: Frequency Lowering (FL): two types Hearing aid A severe sloping loss. responses and targets for speech (input at 65 db SPL) Hearing Aids A and B are both modern devices, and are at maximum settings in this region. Both fall below threshold above 2 Hz (speech peaks are audible to about 25 Hz not shown). Frequency Compression (FC) E.g.: Phonak SoundRecover Frequency Transposition (FT) E.g.: Widex AudibilityExtender Review: Simpson (29), Trends in Amplification Below cutoff Below cutoff Above cutoff Above cutoff Spectral analysis of FC: Spectrographic analysis of FC: f3 - original - no NFC f3 - CR = 2, CF = 4k Time (s) Time (s) f3 - CR = 2, CF = 3k f3 - CR = 2, CF = 2k Time (s) Time (s) 2
3 What does FC sound like? 3kHz, 2:1 and 6:1 2kHz, 2:1 Original Fitting Method (pediatric): 1) Provide more audibility of high frequency cues than is possible with a well-fitted device. The frequency response is based on DSL5 child to maximize the bandwidth of the fitting without frequency lowering. 2) We verify using measuresthat show us audibility of specific high frequency speech bands (see Glista & Scollie, AudiologyOnline 29) Clinical verification Sample fitting: Running speech can be used. Broadband noises can be used (not shown). Speech in the lower band (unchanged). Speech in the upper band (compressed). Audibility is better here (judging by peak SL of at least 1 db). Audibility is limited here Sample fitting: Sample fitting (with FC): SSSSS SSSSS SHHHH SHHHH 3
4 Live /s/ versus calibrated /si/ at 7 db SPL: shhh (FC on) sss (FC on) shi (FC on) si (FC on) Clinical verification Live speech productions of /s/ and /sh/ can be used. They are not calibrated, but provide an informal way to see change in the frequency location of speech sounds. They provide a realistic view of the bandwidth and frequency location of the frication bands of /s/ and /sh/. SSSSS SSSSS SHHHH SHHHH Without FC With FC New clinical tests A new test signal from the Verifit allows us to see if a high frequency band is lowered. Run with & without SoundRecover. Test at 3.1, 4k, 5k or 6.3kHz. Mayoffer a calibrated alternative to live voice /s/ and /sh/. Narrower bandwidth though. Level - Level - Level - Original signal (speech passages, used for regular verification) Frequency - High frequency speech band Low frequency Notch speech energy (empty area) Frequency - Lowered speech band Low frequency Notch speech energy (empty area) Verifit Speech Bands with/without: This speech signal has been notch filtered With FC, here. 63 Hz above A high frequency threshold: band is left (63 Hz in this example.) The notch lets you observe lowering of the high frequency band. Without FC, the 63 Hz band is below threshold. Frequency - Our uses of this new test Is the 6.3kHz region audible with vs. without SoundRecover? With Without Our uses of this new test With SoundRecover on, are the 4kHz and 6kHz regions overlapping? Our previous research tells us that overlapping /s/ and /sh/ using high SoundRecover settings led to rejection. The 4kHz and 6.3kHz bands are similar to /s/ and /sh/. Little overlap 4k and 6.3 khz A lot of overlap This setting may be good to try. This setting may be using too much. 4
5 Some studies of frequency lowering: (other studies have been done in adults, plus other non-peer reviewed in kids) FC in children: Glista et al., 29a FC improves detection/recognition (group vs individual) Significant candidacy factors (hearing loss, age group) FT (various types) in children: Miller-Hansen et al, 23, MacArdle et al, 21 FT improves detection & recognition (group vs individual) Auriemmo et al, 29 FT + training improved consonant recognition (other outcomes) Smith et al, 29 FT improved consonant recognition Efficacy? Experimental design factors Baseline FC should be compared to the best possible fitting. Does this change over time as the fittable bandwidth extends? Candidacy? Aid FC is best evaluated within-devices. Allows us to hold all other device variables constant. Fitting FC settings should be appropriate to the individual. Optimal settings are not yet known, but fitting, tuning, and verification are possible. Time An acclimatization period may be necessary. What does this mean for studies comparing FL strategies? Measures As with all hearing aid research, blinding is needed for subjective measures. Sensitive tests are needed but may not test all speech sounds a test battery? On to the field trial Study design. 24 patients: 11 children and 13 adults A wide range of hearing losses from mild through profound. Glista, D., Scollie, S., Bagatto, M. Seewald, R., Parsa, V., Johnson. A. (accepted). Evaluation of nonlinear frequency compression: Clinical outcomes. International Journal of Audiology. Time course Objective Duration Participant intake Acclimatization phase NFC phase Multimemory phase Withdrawal testing Audiometric evaluation. Hearing aid fitting (CP). Range: 2 weeks to 3 Real world trial with CP. Practice tests. Real world trial with NFC. Outcome evaluation with NFC. Real world trial with user selectable NFC. Evaluation of real world preferences. Outcome evaluation without NFC. months Mean: 4.17 weeks Range: 3 weeks to 1.3 years Mean: 1.75 weeks Range: 2 weeks to 5 months Mean: 5.58 weeks Fitting recap: Hearing aids were first fitted using DSL, without NFC. Then we individualized it, and activated it, testing for: Improvements in audibility /s/-/sh/ separation in frequency Sound quality User reaction (if possible) Results after several weeks of use Outcomes battery: Aided detection thresholds of the phonemes s, ʃ Recognition of high frequency consonants: /ʧ, d, f, ʤ, k, s, ʃ, t, d, z/ spoken by two female talkers Identification of word-final pluralson 15 words: ant, balloon, book, butterfly, crab, crayon, cup, dog, fly, flower, frog, pig, skunk, sock and shoe Double blind subjective preference. Speech production. 5
6 Speech sound detection improved. Consonant & word-final plural recognition improved. Some adults benefit more. Children s results look better. Audiometric & age candidacy. Summary of outcomes Significant predictors of outcome: Age group (adult versus child) Better ear high frequency pure tone average The lowest frequency at which the audiogram had a severe loss (drop off frequency) db HL db HL Frequency Frequency On average, the NFC processor improved speech sound detection thresholds, as well as consonant and plural recognition scores; vowel perception was not significantly changed. Individual results indicated that age group and degree and configuration of hearing loss were related to NFC benefit and to preference. Variance in individual outcome results was considerable. Individual determination of candidacy is warranted when considering NFC use in clinical application. 6
7 Does it affect speech production? Trial participants were recorded while repeating sentences: Give me your socks. She got a shot. Soup is good food. My shoes are new. I see the fox. And while answering questions (e.g., Tell me how you would plant a seed.). Before NFC and after 9.5 weeks mean acclimatization Range: 6 to 14 weeks Electroacoustic and subjective analyses Long term average speech spectra (all children). 1/3 Octave Band Level (db SPL) Normal Hearing Children Hearing Impaired Children (Conv) Hearing Impaired Children (FC) Vowel space (one child): Can you tell me how to plant a seed? F1 (Hz) Conv Area = /i/ F2 - /u/ F2 = /a/ /i/ /u/ F1 (Hz) FC Area = /i/ F2 - /u/ F2 = /a/ /i/ /u/ db HL Frequency , 6:1 Significant benefit with NFC Now I hear /s/ where before there was only silence Difficulty adjusting F2 (Hz) F2 (Hz) Can you tell me how to plant a seed? and how to make a sandwich? db HL Frequency 35 Hz, 2:1 No objective benefit because at ceiling on all measures at baseline. Significant blinded preference Follow up The FC processor was included in a commercial product & labelled SoundRecover. Our participants, who by now had been wearing prototypes for some time, were called back in to have their aids replaced with commercial devices & retesting. 7
8 Prototype versus commercial: The commercial aid had more gain and a slightly different frequency response. The frequency compression parameters are not as adjustable, and limit the CR to 4:1. We matched as closely as possible. Participants were retested with prototypes so that commercial/prototype differences shown are not attributable to acclimatization. Paper Three: Comparison of prototype to Naida, as described in Glista et al, (29b). Glista, D., Scollie, S., Polonenko, M., & Sulkers, J. (29, November). Prototype nonlinear frequency compression versus SoundRecover : A comparison of performance in children. The Hearing Review. Participants: 1 child participants from the Glista et al. (29a) study Devices: Savia 311 and 411, modified to include prototype NFC Naida V SP and UP with SoundRecover NFC Fitting: Participants wore Savia hearing aids for at least one year (M = 2.3) prior to being refit with Naida Frequency response, amplitude compression, frequency compression and other signal processing features of Naida were matched to each participant s Savia Glista, D., Scollie, S., Polonenko, M., & Sulkers, J. (29, November). Prototype nonlinear frequency compression versus SoundRecover : A comparison of performance in children. The Hearing Review. Devices were well matched. Matching NFC Cut-Off and Ratio Ear Canal Level (db SPL) 12 (a) Right Ear Fit to Targets Targets Naida Measured REAR Prototype Measured REAR Threshold 2 Ear Canal Level (db SPL) 12 (b) Left Ear Fit to Targets Targets Naida Measured REAR Prototype Measured REAR Threshold 2 Subject Savia cut-off (khz) Savia compression ratio values Naida cut-off (khz) Naida compression ratio values : : :1 1 4: : : : :1 262 R 3 L 27 R 4:1 L 6:1 29 4: :1 22 4: :1 15 4: :1 1 4: : : : :1 8
9 How to read the next few slides: How to read the next few slides: Vowel Recognition score (perecnt correct) Across these time points. These 2 test points are from the original trial These 2 test points are from about a year later Plural Recognition score (percent correct) If scores look like this Benefit Vowel Recognition score (perecnt correct) Across these time points. These 2 test points are from the original trial These 2 test points are from about a year later Plural Recognition score (percent correct) If scores look like this No change s, ʃdetection same or better with FC; some cases better with Naida. Consonant Recognition: some children benefit from NFC. Detection Threshold (db HL) -2 2 /s/ Detection Threshold (db HL) -2 2 / / Consonant Recognition score (percent correct) Plural Recognition: most children benefit from FC. Vowel Recognition largely unaffected by NFC. Plural Recognition score (percent correct) Vowel Recognition score (perecnt correct)
10 But what about individuals? Some children showed a lot of change over time. In the previous slides, the same children are marked with the same colours throughout. Let`s look back at a few. Are we seeing possible acclimatization effects? Do children need an acclimatization period? Danielle Glista, Ph.D. Child Amplification Laboratory National Centre for Audiology, University of Western Ontario What is auditory acclimatization? New acoustic information Example: new audibility of speech cues post hearing aid fitting Time to acclimatize Systematic change in auditory performance From the Eriksholm workshop on Auditory Deprivation and Acclimatization (Arlinger et al., 1996) Why study auditory acclimatization? Work by Stuart Gatehouse and the Eriksholm Workshop on Auditory Deprivation and Acclimatization (1995): Auditory acclimatization is a real phenomenon with importance research/clinical implications Evidence suggests the mean reported improvement in benefit over times ranges from to 1% (across speech materials and presentation conditions) (Arlinger et al., 1996) Why study auditory acclimatization? Study design Previous research on nonlinear frequency compression (FC) and speech perception benefit suggests: Considerable performance variability at the level of the individual - adult and child data (Simpson, 29) Pediatric pilot data provides informal evidence of an acclimatization effect for some listeners (Glista et al, 29) As with all fittings involving new, complex signal processing, adaptation time becomes important Baseline Phase (No FC) Treatment Phase (with FC) Withdrawal Phase (No FC) Structure/Objective Real-world usage DSL v5. with adjustments to preference 2-3 testing sessions Stopping criterion: Asymptotic performance Goal: Minimize practice effects and/or acclimatization effects from previous fitting 4 testing sessions,spaced 2 weeks apart+ 2 monthly testing sessions Goal: Track time course/magnitude of an acclimatization effect 1 testing session FC disabled in lab only Goal: Establish FC effect post-acclimatization 1
11 Case Study 11 years of age Exposure to ototoxic medication Long-term, fulltime HA user Suspected dead regions (TEN test: Moore, Glasberg & Stone, 24) Hearing Threshold Level (db HL) 2 12 CNT DR DR DR Fitting details Study worn aids = Naida IX SP, SoundRecover setting = 1 Hz cut-off, 4:1 ratio DSL v5., FC setting individualized (refer to AudiologyOnline: Glista & Scollie, 29) Is this enough? 63 Hz with FC Hz with FC Live / / is Hz without FC broader in bandwidth 63 Hz without FC Filtered high-frequency speech bands Screen captures from the Audioscan Verifit / / /s/ Live speech with FC enabled Results Speech recognition: Plurality UWO Plurals Test Results Speech recognition: Consonants DFD Test (Cheesman & Jamieson, 1996) Crayon Crayons Baseline Treatment Withdrawal Improvement atil Time course Results Discrimination of /s/ vs. / / see she see Results Detection of /s/ and / / Ling-6 Sound Test mmm ooo aaa sss eee shh 11
12 Clinical implications Overall, significant speech perception benefit was reported with FC compared to without FC Acclimatization trends with FC: Benefit change ranged from to 17%, across measures Significant acclimatization trends were observed after approximately 6 weeks or longer Two unique acclimatization patterns where exemplified: Gradual improvement over time Improvement after a specific period of acclimatization (S-shaped curve) Further cases are currently under analysis Clinical implications Speech recognition tests at the time of fitting may not reflect later performance. Testing before and after an acclimatization period may reveal changes over time. Selected References: Thank you for listening Boretzki, M., Kegel, A. 29. The benefits of nonlinear frequency compression for people with mild hearing loss. Audiology Online, November. Glista D, Scollie S. 29. Modified verification approaches for frequency lowering devices. Audiology Online, November. Glista, D., Scollie, S., Bagatto, M., Seewald, R., Parsa, V., Johnson, A. 29a. Evaluation of nonlinear frequency compression: Clinical outcomes. International Journal of Audiology, Vol. 48, No. 9, Pages Glista, D., Scollie, S., Polonenko, M. and Sulkers, J. 29b. A Comparison of Performance in Children with Nonlinear Frequency Compression Systems. Hearing Review, November. MacArdle, B. M., West, C., Bradley, J., Worth, S., Mackenzie, J., and Bellman, S. C. 21. A study of the application of a frequency transposition hearing system in children. British Journal of Audiology 35: Miller-Hansen, D. R., Nelson, P. B., Widen, J. E., and Simon, S. D. 23. Evaluating the benefit of speech recoding hearing aids in children. American Journal of Audiology 12(2): Moeller, M. P., Hoover, B., Putman, C., Arbataitis, K., Bohnenkamp, G., Peterson, B., et al. 27. Vocalizations of infants with hearing loss compared with infants with normal hearing: Part I--phonetic development. Ear and Hearing, 28(5), Pittman, A. 28. Short-Term Word-Learning Rate in Children With Normal Hearing and Children With Hearing Loss in Limited and Extended High-Frequency Bandwidths. Journal of Speech, Language, and Hearing Research Vol Stelmachowicz, P. G., Pittman, A. L., Hoover, B. M., Lewis, D. E., and Moeller, M. P. 24. The importance of highfrequency audibility in the speech and language development of children with hearing loss. Archives of Otolaryngology - Head and Neck Surgery 13(5): Wolfe, J., John, A., Schafer, E., and Caraway, T. (in press). Evaluation of non-linear frequency compression for children with moderate hearing loss. Journal of the American Academy of Audiology. 12
Fitting Frequency Compression Hearing Aids to Kids: The Basics
Fitting Frequency Compression Hearing Aids to Kids: The Basics Presenters: Susan Scollie and Danielle Glista Presented at AudiologyNow! 2011, Chicago Support This work was supported by: Canadian Institutes
More informationBest Practice Protocols
Best Practice Protocols SoundRecover for children What is SoundRecover? SoundRecover (non-linear frequency compression) seeks to give greater audibility of high-frequency everyday sounds by compressing
More informationThe University of Western Ontario Plurals Test v1.4
The University of Western Ontario Plurals Test v1.4 Susan Scollie & Danielle Glista, June 2012 Copyright 2012, The University of Western Ontario, Not for Distribution Table of Contents Overview... 3 Set-up
More informationBest practices in A few favorite resources: Clear areas of agreement: How about these features? The bottom line:
Today s hearing aids: Using technology to its best potential Susan Scollie, Ph.D. Associate Professor Child Amplification Laboratory School of Communication Sciences and Disorders National Centre for Audiology
More informationBaker, A., M.Cl.Sc (AUD) Candidate University of Western Ontario: School of Communication Sciences and Disorders
Critical Review: Effects of multi-channel, nonlinear frequency compression on speech perception in hearing impaired listeners with high frequency hearing loss Baker, A., M.Cl.Sc (AUD) Candidate University
More informationSoundRecover2: Description and Verification Protocols
SoundRecover2: Description and Verification Protocols Susan Scollie, Child Amplification Lab National Centre for Audiology, Western University Contributors: Danielle Glista, Marianne Hawkins, Andrea Bohnert,
More informationAJA. Research Article
AJA Research Article Development and Evaluation of an English Language Measure of Detection of Word-Final Plurality Markers: The University of Western Ontario Plurals Test Danielle Glista a and Susan Scollie
More informationCritical Review: Based on its effect on speech and phoneme recognition in children, should frequency lowering be used in pediatric amplification?
Critical Review: Based on its effect on speech and phoneme recognition in children, should frequency lowering be used in pediatric amplification? Irene Nicholaou M.Cl.Sc AUD Candidate University of Western
More informationBest practice protocol
Best practice protocol April 2016 Pediatric verification for SoundRecover2 What is SoundRecover? SoundRecover is a frequency lowering signal processing available in Phonak hearing instruments. The aim
More informationCandidacy and Verification of Oticon Speech Rescue TM technology
PAGE 1 TECH PAPER 2015 Candidacy and Verification of Oticon Speech Rescue TM technology Kamilla Angelo 1, Marianne Hawkins 2, Danielle Glista 2, & Susan Scollie 2 1 Oticon A/S, Headquarters, Denmark 2
More informationAudibility, discrimination and hearing comfort at a new level: SoundRecover2
Audibility, discrimination and hearing comfort at a new level: SoundRecover2 Julia Rehmann, Michael Boretzki, Sonova AG 5th European Pediatric Conference Current Developments and New Directions in Pediatric
More informationFREQUENCY LOWERING IN THE PEDIATRIC POPULATION: OUTCOMES AND CONSIDERATIONS FOR FITTING. Capstone. Lauren Virginia Ross, B.A.
FREQUENCY LOWERING IN THE PEDIATRIC POPULATION: OUTCOMES AND CONSIDERATIONS FOR FITTING Capstone Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Audiology in the Graduate
More informationSoundRecover2 More audibility of high-frequency sounds for adults with severe to profound hearing loss
Field Study News July 2016 SoundRecover2 More audibility of high-frequency sounds for adults with severe to profound hearing loss This study was conducted at Phonak headquarters, Stäfa Switzerland, and
More informationAJA. Research Article. Effects of Low-Pass Filtering on the Perception of Word-Final Plurality Markers in Children and Adults With Normal Hearing
AJA Research Article Effects of Low-Pass Filtering on the Perception of Word-Final Plurality Markers in Children and Adults With Normal Hearing Lori J. Leibold, a Hannah Hodson, a Ryan W. McCreery, b Lauren
More informationSoundRecover2 the first adaptive frequency compression algorithm More audibility of high frequency sounds
Phonak Insight April 2016 SoundRecover2 the first adaptive frequency compression algorithm More audibility of high frequency sounds Phonak led the way in modern frequency lowering technology with the introduction
More informationHello Old Friend the use of frequency specific speech phonemes in cortical and behavioural testing of infants
Hello Old Friend the use of frequency specific speech phonemes in cortical and behavioural testing of infants Andrea Kelly 1,3 Denice Bos 2 Suzanne Purdy 3 Michael Sanders 3 Daniel Kim 1 1. Auckland District
More informationChapter 3 NON-LINEAR FREQUENCY COMPRESSION IN HEARING AIDS
Chapter 3 NON-LINEAR FREQUENCY COMPRESSION IN HEARING AIDS Chapter aim: This chapter serves as a theoretical basis for the empirical research and provides a critical evaluation as well as interpretation
More informationValidation Studies. How well does this work??? Speech perception (e.g., Erber & Witt 1977) Early Development... History of the DSL Method
DSL v5.: A Presentation for the Ontario Infant Hearing Program Associates The Desired Sensation Level (DSL) Method Early development.... 198 Goal: To develop a computer-assisted electroacoustic-based procedure
More informationResearch Design: This study consisted of a within-participant design with repeated measures across test conditions.
J Am Acad Audiol 25:1022 1033 (2014) Evaluation of Wideband Frequency Responses and Nonlinear Frequency Compression for Children with Cookie-Bite Audiometric Configurations DOI: 10.3766/jaaa.25.10.10 Andrew
More informationA comparison of manufacturer-specific prescriptive procedures for infants
A comparison of manufacturer-specific prescriptive procedures for infants By Richard Seewald, Jillian Mills, Marlene Bagatto, Susan Scollie, and Sheila Moodie Early hearing detection and communication
More information2/16/2012. Fitting Current Amplification Technology on Infants and Children. Preselection Issues & Procedures
Fitting Current Amplification Technology on Infants and Children Cindy Hogan, Ph.D./Doug Sladen, Ph.D. Mayo Clinic Rochester, Minnesota hogan.cynthia@mayo.edu sladen.douglas@mayo.edu AAA Pediatric Amplification
More informationFREQUENCY COMPOSITION : A NEW APPROACH TO FREQUENCY- LOWERING
FREQUENCY COMPOSITION : A NEW APPROACH TO FREQUENCY- LOWERING -lowering has come a long way. Over time, the technique has evolved from a controversial feature to one that is gaining more and more acceptance.
More informationC HAPTER FOUR. Audiometric Configurations in Children. Andrea L. Pittman. Introduction. Methods
C HAPTER FOUR Audiometric Configurations in Children Andrea L. Pittman Introduction Recent studies suggest that the amplification needs of children and adults differ due to differences in perceptual ability.
More informationMonitoring Outcomes of Infants and Children Who Wear Hearing Aids. Marlene P. Bagatto, Au.D., Ph.D. Danielle Glista, Ph.D. Susan D. Scollie, Ph.D.
C h a p t e r Five Monitoring Outcomes of Infants and Children Who Wear Hearing Aids Marlene P. Bagatto, Au.D., Ph.D. Danielle Glista, Ph.D. Susan D. Scollie, Ph.D. Abstract Outcome measurement is a key
More informationPaediatric Amplification
Paediatric Amplification The paediatric technical advisory group (PTAG) of the NZAS recommends following the protocols found in UNHSEIP Diagnostic and Amplification Protocols (January, 2016). These guidelines
More informationMarlene Bagatto & Anne Marie Tharpe. A Sound Foundation Through Early Amplification Conference Chicago, USA December 10, 2013
Marlene Bagatto & Anne Marie Tharpe A Sound Foundation Through Early Amplification Conference Chicago, USA December 10, 2013 Background Good consensus on the benefits of amplification for children with
More informationMarlene Bagatto The University of Western Ontario, London, Canada. European Pediatric Amplification Conference Istanbul, Turkey November 15, 2011
Marlene Bagatto The University of Western Ontario, London, Canada European Pediatric Amplification Conference Istanbul, Turkey November 15, 2011 Intervention for Childhood Hearing Loss Access to early
More informationPotential Mechanisms for Perception of Frequency-Lowered Speech
Potential Mechanisms for Perception of Frequency-Lowered Speech Joshua M. Aleander Ph.D., CCC-A Disclosures I have received past research support from The National Institutes of Health The Indiana Clinical
More informationFrom /I/ to /fis/ Terminology. How do frequency compressing hearing aids differ from conventional-style digital aids?
From /I/ to /fis/ Using Speech Production as a Guide to Fitting Frequency Compression Hearing Aids in Children. Julie Christensen, M.S., CCC-A Boys Town National Research Hospital Terminology Frequency
More informationThe effect of nonlinear frequency compression and linear frequency transposition on speech perception in school-aged children
Washington University School of Medicine Digital Commons@Becker Independent Studies and Capstones Program in Audiology and Communication Sciences 2010 The effect of nonlinear frequency compression and
More informationThe Influence of Audibility on Speech Recognition With Nonlinear Frequency Compression for Children and Adults With Hearing Loss
The Influence of Audibility on Speech Recognition With Nonlinear Frequency Compression for Children and Adults With Hearing Loss Ryan W. McCreery, 1 Joshua Alexander, Marc A. Brennan, 1 Brenda Hoover,
More informationHCS 7367 Speech Perception
Long-term spectrum of speech HCS 7367 Speech Perception Connected speech Absolute threshold Males Dr. Peter Assmann Fall 212 Females Long-term spectrum of speech Vowels Males Females 2) Absolute threshold
More informationFrequency-Lowering Devices for Managing High-Frequency Hearing Loss: A Review
Frequency-Lowering Devices for Managing High-Frequency Hearing Loss: A Review Trends in Amplification Volume 13 Number 2 June 2009 87-106 2009 The Author(s) 10.1177/1084713809336421 http://tia.sagepub.com
More informationThe Situational Hearing Aid Response Profile (SHARP), version 7 BOYS TOWN NATIONAL RESEARCH HOSPITAL. 555 N. 30th St. Omaha, Nebraska 68131
The Situational Hearing Aid Response Profile (SHARP), version 7 BOYS TOWN NATIONAL RESEARCH HOSPITAL 555 N. 30th St. Omaha, Nebraska 68131 (402) 498-6520 This work was supported by NIH-NIDCD Grants R01
More informationThe Desired Sensation Level (DSL) method has had
AJA Research Article Children s Speech Recognition and Loudness Perception With the Desired Sensation Level v5 Quiet and Noise Prescriptions Jeffery Crukley a and Susan D. Scollie a Purpose: To determine
More informationPhonak Target. SoundRecover2 adult fitting guide. Content. The Connecting the hearing instruments. February 2018
Phonak Target February 2018 SoundRecover2 adult fitting guide The following fitting guide is intended for adults. For Pediatric fittings please see the separate Pediatric fitting guide. SoundRecover2 is
More informationSupplementary Online Content
Supplementary Online Content Tomblin JB, Oleson JJ, Ambrose SE, Walker E, Moeller MP. The influence of hearing aids on the speech and language development of children with hearing loss. JAMA Otolaryngol
More informationEvidence base for hearing aid features:
Evidence base for hearing aid features: { the ʹwhat, how and whyʹ of technology selection, fitting and assessment. Drew Dundas, PhD Director of Audiology, Clinical Assistant Professor of Otolaryngology
More informationClinical fitting guide
Fitting Super Power is now super easy A quick reference to the Super Power features of Max: Super Power pre-sets Frequency compression 2 Power Adaptation Manager (PAM) A Sonova brand Why are we making
More informationJacob Sulkers M.Cl.Sc (AUD) Candidate University of Western Ontario: School of Communication Sciences and Disorders
Critical Review: The (Sound) Wave of the Future: Is Forward Pressure Level More Accurate than Sound Pressure Level in Defining In Situ Sound Levels for Hearing Aid Fitting? Jacob Sulkers M.Cl.Sc (AUD)
More informationSlow compression for people with severe to profound hearing loss
Phonak Insight February 2018 Slow compression for people with severe to profound hearing loss For people with severe to profound hearing loss, poor auditory resolution abilities can make the spectral and
More informationAudiology Today MarApr2011
26 Stay on Target? By Jason A. Galster The focus on gain and targets has obscured the most important part of the real-ear measurement audibility. The topic of audibility is familiar; after all, a primary
More informationSonic Spotlight. Frequency Transfer Providing Audibility For High-Frequency Losses
Frequency Transfer 1 Sonic Spotlight Frequency Transfer Providing Audibility For High-Frequency Losses Through the years, hearing care professionals have become good prognosticators. With one look at the
More informationVerification of soft speech amplification in hearing aid fitting: A comparison of methods
Verification of soft speech amplification in hearing aid fitting: A comparison of methods Sarah E. Dawkins, B.A. AuD Research Project April 5, 2007 University of Memphis Project Advisor Robyn M. Cox, PhD.
More informationEVALUATION OF SPEECH PERCEPTION IN PATIENTS WITH SKI SLOPE HEARING LOSS USING ARABIC CONSTANT SPEECH DISCRIMINATION LISTS
EVALUATION OF SPEECH PERCEPTION IN PATIENTS WITH SKI SLOPE HEARING LOSS USING ARABIC CONSTANT SPEECH DISCRIMINATION LISTS Mai El Ghazaly, Resident of Audiology Mohamed Aziz Talaat, MD,PhD Mona Mourad.
More informationInternational Journal of Health Sciences and Research ISSN:
International Journal of Health Sciences and Research www.ijhsr.org ISSN: 2249-9571 Original Research Article Effect of Compression Parameters on the Gain for Kannada Sentence, ISTS and Non-Speech Signals
More informationAudiogram+: The ReSound Proprietary Fitting Algorithm
Abstract Hearing instruments should provide end-users with access to undistorted acoustic information to the degree possible. The Resound compression system uses state-of-the art technology and carefully
More informationExamining Recommendations for Hearing Aid Use In Children with Unilateral Hearing Loss
Examining Recommendations for Hearing Aid Use In Children with Unilateral Hearing Loss Marlene Bagatto Unilateral Hearing Loss in Children Conference October 23-25, 2017 Philadelphia, PA, USA Background
More informationPhoneme Perception Test 3.0
Phoneme Perception Test 3.0 August 2017 Desktop Fitting Guide The Phoneme Perception Test is a NOAH-compatible software, designed for assessing your clients hearing abilities. The Phoneme Perception Test
More informationComparing Speech Perception Abilities of Children with Cochlear Implants and Digital Hearing Aids
Comparing Speech Perception Abilities of Children with Cochlear Implants and Digital Hearing Aids Lisa S. Davidson, PhD CID at Washington University St.Louis, Missouri Acknowledgements Support for this
More informationThe effect of talker age and gender on speech perception of pediatric hearing aid users
Washington University School of Medicine Digital Commons@Becker Independent Studies and Capstones Program in Audiology and Communication Sciences 2011 The effect of talker age and gender on speech perception
More informationFREQUENCY COMPRESSION AND FREQUENCY SHIFTING FOR THE HEARING IMPAIRED
FREQUENCY COMPRESSION AND FREQUENCY SHIFTING FOR THE HEARING IMPAIRED Francisco J. Fraga, Alan M. Marotta National Institute of Telecommunications, Santa Rita do Sapucaí - MG, Brazil Abstract A considerable
More informationDigital noise reduction in hearing aids and its acoustic effect on consonants /s/ and /z/
ORIGINAL ARTICLE Digital noise reduction in hearing aids and its acoustic effect on consonants /s/ and /z/ Foong Yen Chong, PhD 1, 2, Lorienne M. Jenstad, PhD 2 1 Audiology Program, Centre for Rehabilitation
More informationFor most hearing losses, the primary goal of amplification is to provide
Spectral Characteristics of Speech at the Ear: Implications for Amplification in Children Andrea L. Pittman Patricia G. Stelmachowicz Dawna E. Lewis Brenda M. Hoover Boys Town National Research Hospital
More informationThe Devil is in the Fitting Details. What they share in common 8/23/2012 NAL NL2
The Devil is in the Fitting Details Why all NAL (or DSL) targets are not created equal Mona Dworsack Dodge, Au.D. Senior Audiologist Otometrics, DK August, 2012 Audiology Online 20961 What they share in
More informationOptimal Filter Perception of Speech Sounds: Implications to Hearing Aid Fitting through Verbotonal Rehabilitation
Optimal Filter Perception of Speech Sounds: Implications to Hearing Aid Fitting through Verbotonal Rehabilitation Kazunari J. Koike, Ph.D., CCC-A Professor & Director of Audiology Department of Otolaryngology
More informationDanielle Glista, 1 Vijayalakshmi Easwar, 2 David W. Purcell, 3 and Susan Scollie Introduction
International Journal of Otolaryngology Volume 1, Article ID 99, 1 pages doi:1.1155/1/99 Research Article A Pilot Study on Cortical Auditory Evoked Potentials in Children: Aided CAEPs Reflect Improved
More informationVerifying the Lyric Audibility Advantage
Field Study News Spring 2014 Verifying the Lyric Audibility Advantage John Pumford, Au.D. Manager of Clinical Research Phonak Lyric Introduction Since 2008, Lyric has presented people with mild to moderate
More informationAUDL GS08/GAV1 Signals, systems, acoustics and the ear. Pitch & Binaural listening
AUDL GS08/GAV1 Signals, systems, acoustics and the ear Pitch & Binaural listening Review 25 20 15 10 5 0-5 100 1000 10000 25 20 15 10 5 0-5 100 1000 10000 Part I: Auditory frequency selectivity Tuning
More informationAcoustics, signals & systems for audiology. Psychoacoustics of hearing impairment
Acoustics, signals & systems for audiology Psychoacoustics of hearing impairment Three main types of hearing impairment Conductive Sound is not properly transmitted from the outer to the inner ear Sensorineural
More informationSpeech Cue Weighting in Fricative Consonant Perception in Hearing Impaired Children
University of Tennessee, Knoxville Trace: Tennessee Research and Creative Exchange University of Tennessee Honors Thesis Projects University of Tennessee Honors Program 5-2014 Speech Cue Weighting in Fricative
More informationPredictors of aided speech recognition, with and without frequency compression, in older adults.
Predictors of aided speech recognition, with and without frequency compression, in older adults. Rachel J Ellis and Kevin J Munro Linköping University Post Print N.B.: When citing this work, cite the original
More informationPrescribe hearing aids to:
Harvey Dillon Audiology NOW! Prescribing hearing aids for adults and children Prescribing hearing aids for adults and children Adult Measure hearing thresholds (db HL) Child Measure hearing thresholds
More informationChapter 7 CONCLUSION AND RECOMMENDATIONS
Chapter 7 CONCLUSION AND RECOMMENDATIONS Chapter aim: The aim of this chapter is to clarify the conclusions drawn from the results of this research project, critically evaluate the findings and formulate
More informationSonic Spotlight. SmartCompress. Advancing compression technology into the future
Sonic Spotlight SmartCompress Advancing compression technology into the future Speech Variable Processing (SVP) is the unique digital signal processing strategy that gives Sonic hearing aids their signature
More information1706 J. Acoust. Soc. Am. 113 (3), March /2003/113(3)/1706/12/$ Acoustical Society of America
The effects of hearing loss on the contribution of high- and lowfrequency speech information to speech understanding a) Benjamin W. Y. Hornsby b) and Todd A. Ricketts Dan Maddox Hearing Aid Research Laboratory,
More informationMarlene Bagatto. The University of Western Ontario, London, Canada. Sound Foundations 2010, Chicago, USA
Marlene Bagatto The University of Western Ontario, London, Canada Sound Foundations 2010, Chicago, USA Acknowledgements Funding Sources: Canadian Institutes of Health Research Vanier Canada Graduate Scholarship
More informationHigh-Frequency Amplification: Sharpening the Pencil
CHAPTER ELEVEN High-Frequency Amplification: Sharpening the Pencil Andrea Pittman Introduction High-frequency amplification is similar to a sharpened pencil. When amplification is extended to frequencies
More informationAnumber of studies have shown that the perception of speech develops. by Normal-Hearing and Hearing- Impaired Children and Adults
Perception of Voiceless Fricatives by Normal-Hearing and Hearing- Impaired Children and Adults Andrea L. Pittman Patricia G. Stelmachowicz Boys Town National Research Hospital Omaha, NE This study examined
More informationInterpreting Speech Results to Optimise Hearing aid Fittings
Interpreting Speech Results to Optimise Hearing aid Fittings Josephine Marriage PhD josephine@chears.co.uk BAA Monday 18 th November 2013 How has the role of families changed with introduction of NHSP?
More informationAudiogram+: GN Resound proprietary fitting rule
Audiogram+: GN Resound proprietary fitting rule Ole Dyrlund GN ReSound Audiological Research Copenhagen Loudness normalization - Principle Background for Audiogram+! Audiogram+ is a loudness normalization
More informationThe effect of wearing conventional and level-dependent hearing protectors on speech production in noise and quiet
The effect of wearing conventional and level-dependent hearing protectors on speech production in noise and quiet Ghazaleh Vaziri Christian Giguère Hilmi R. Dajani Nicolas Ellaham Annual National Hearing
More informationASR. ISSN / Audiol Speech Res 2017;13(3): / RESEARCH PAPER
ASR ISSN 1738-9399 / Audiol Speech Res 217;13(3):216-221 / https://doi.org/.21848/asr.217.13.3.216 RESEARCH PAPER Comparison of a Hearing Aid Fitting Formula Based on Korean Acoustic Characteristics and
More informationEEL 6586, Project - Hearing Aids algorithms
EEL 6586, Project - Hearing Aids algorithms 1 Yan Yang, Jiang Lu, and Ming Xue I. PROBLEM STATEMENT We studied hearing loss algorithms in this project. As the conductive hearing loss is due to sound conducting
More informationFREQUENCY. Prof Dr. Mona Mourad Dr.Manal Elbanna Doaa Elmoazen ALEXANDRIA UNIVERSITY. Background
FREQUENCY TRANSPOSITION IN HIGH FREQUENCY SNHL Prof Dr. Mona Mourad Dr.Manal Elbanna Doaa Elmoazen Randa Awad ALEXANDRIA UNIVERSITY Background Concept Of Frequency Transposition Frequency transposition
More informationSPEECH PERCEPTION IN A 3-D WORLD
SPEECH PERCEPTION IN A 3-D WORLD A line on an audiogram is far from answering the question How well can this child hear speech? In this section a variety of ways will be presented to further the teacher/therapist
More informationI. INTRODUCTION. J. Acoust. Soc. Am. 110 (4), October /2001/110(4)/2183/8/$ Acoustical Society of America
Effect of stimulus bandwidth on the perception of ÕsÕ in normal- and hearing-impaired children and adults Patricia G. Stelmachowicz, Andrea L. Pittman, Brenda M. Hoover, and Dawna E. Lewis Boys Town National
More informationHCS 7367 Speech Perception
Babies 'cry in mother's tongue' HCS 7367 Speech Perception Dr. Peter Assmann Fall 212 Babies' cries imitate their mother tongue as early as three days old German researchers say babies begin to pick up
More informationWheeler, K.S. M.Cl.Sc. (Aud) Candidate School of Communication Sciences and Disorders, U.W.O
Copyright 2007 by Wheeler, K.S. Critical Review: Is there evidence that auditory steady-state response measures provide a more accurate electrophysiological estimate of behavioural thresholds in infants
More informationA FEW HEARING AID FEATURES: HOW EFFECTIVE ARE THEY AND ARE THERE MANUFACTURER DIFFERENCES?
Todd A. Ricketts, PhD A FEW HEARING AID FEATURES: HOW EFFECTIVE ARE THEY AND ARE THERE MANUFACTURER DIFFERENCES? Professor and Director of Graduate Studies Department of Hearing and Speech Sciences Director,
More informationPaediatric Whitepaper
Paediatric Whitepaper May 2009 Electrophysiological Threshold Estimation and Infant Hearing Instrument Fitting Merethe Lindgaard Fuglholt, M.A. Oticon A/S, Paediatric Audiology Abstract This paper addresses
More informationWIDEXPRESS. no.30. Background
WIDEXPRESS no. january 12 By Marie Sonne Kristensen Petri Korhonen Using the WidexLink technology to improve speech perception Background For most hearing aid users, the primary motivation for using hearing
More informationPower Instruments, Power sources: Trends and Drivers. Steve Armstrong September 2015
Power Instruments, Power sources: Trends and Drivers Steve Armstrong September 2015 Focus of this talk more significant losses Severe Profound loss Challenges Speech in quiet Speech in noise Better Listening
More informationInfant Hearing Development: Translating Research Findings into Clinical Practice. Auditory Development. Overview
Infant Hearing Development: Translating Research Findings into Clinical Practice Lori J. Leibold Department of Allied Health Sciences The University of North Carolina at Chapel Hill Auditory Development
More informationEffect of Adaptive Frequency Lowering on Phoneme Identification and Sound Quality of Music in Hearing-impaired Listeners
James Madison University JMU Scholarly Commons Dissertations The Graduate School Spring 2015 Effect of Adaptive Frequency Lowering on Phoneme Identification and Sound Quality of Music in Hearing-impaired
More informationDifferences in Sensation Level between the Widex SoundTracker and Two Real-Ear Analyzers DOI: /jaaa
J Am Acad Audiol 24:660 670 (2013) Differences in Sensation Level between the Widex SoundTracker and Two Real-Ear Analyzers DOI: 10.3766/jaaa.24.8.3 Kristi Oeding* Michael Valente* Abstract Background:
More informationChildFit. Widex Baby. Compass quick guide
ChildFit When working with very young children, it is not always possible to obtain all of the information necessary for an accurate hearing aid fitting. To that end, Widex has developed the ChildFit procedure
More informationLater-amplified NOW Later-amplified THEN Early compared to pre-unhs Delayed onset hearing loss Less hearing loss Mild hearing loss Average age of ID
Conflict of Interest Disclosure Maximizing auditory development outcomes in children with hearing loss Ryan McCreery, PhD ryan.mccreery@boystown.org Research presented here was supported by the National
More informationGroup Delay or Processing Delay
Bill Cole BASc, PEng Group Delay or Processing Delay The terms Group Delay (GD) and Processing Delay (PD) have often been used interchangeably when referring to digital hearing aids. Group delay is the
More informationIssues faced by people with a Sensorineural Hearing Loss
Issues faced by people with a Sensorineural Hearing Loss Issues faced by people with a Sensorineural Hearing Loss 1. Decreased Audibility 2. Decreased Dynamic Range 3. Decreased Frequency Resolution 4.
More informationDSL v5 in Connexx 7 Mikael Menard, Ph.D., Philippe Lantin Sivantos, 2015.
www.bestsound-technology.com DSL v5 in Connexx 7 Mikael Menard, Ph.D., Philippe Lantin Sivantos, 2015. First fit is an essential stage of the hearing aid fitting process and is a cornerstone of the ultimate
More informationThe impact of frequency compression on cortical evoked potentials and perception
University of Iowa Iowa Research Online Theses and Dissertations Spring 2014 The impact of frequency compression on cortical evoked potentials and perception Benjamin James Kirby University of Iowa Copyright
More informationAlthough considerable work has been conducted on the speech
Influence of Hearing Loss on the Perceptual Strategies of Children and Adults Andrea L. Pittman Patricia G. Stelmachowicz Dawna E. Lewis Brenda M. Hoover Boys Town National Research Hospital Omaha, NE
More informationProviding Effective Communication Access
Providing Effective Communication Access 2 nd International Hearing Loop Conference June 19 th, 2011 Matthew H. Bakke, Ph.D., CCC A Gallaudet University Outline of the Presentation Factors Affecting Communication
More informationA Sound Foundation Through Early Amplification
11 A Sound Foundation Through Early Amplification Proceedings of the 7th International Conference 2016 Hear well or hearsay? Do modern wireless technologies improve hearing performance in CI users? Jace
More informationAndres, A. M.Cl.Sc (AUD.) Candidate The University of Western Ontario: School of Communication Sciences and Disorders
Critical Review: Are amplification features such as digital noise reduction, directional microphone technology, or additional programs beneficial in noisy situations for school-aged children with mild
More informationImproving Audibility with Nonlinear Amplification for Listeners with High-Frequency Loss
J Am Acad Audiol 11 : 214-223 (2000) Improving Audibility with Nonlinear Amplification for Listeners with High-Frequency Loss Pamela E. Souza* Robbi D. Bishop* Abstract In contrast to fitting strategies
More informationPhonak Target 4.3. Desktop Fitting Guide. Content. March 2016
Phonak Target 4.3 March 2016 Desktop Fitting Guide This guide provides you with a detailed introduction to latest hearing instrument fitting with Phonak Target. www.phonakpro.com/target_guide Please also
More information