Andrea Pittman, PhD CCC-A Arizona State University

Transcription

1 Andrea Pittman, PhD CCC-A Arizona State University

2 PPVT Vocabulary Age (Yrs) What s the problem? NHC HIC Chronological Age (Yrs) (Pittman & Latto, in revision)

3 Learning Model Detection Identify an unknown word Configuration Form a stable acoustic representation Form a semantic representation Engagement Use the new word with other words (Gray, Pittman & Weinhold, JSLHR, 214) (Storkel & Lee, Lang Cog Proc, 211) (Leach & Samuel, Cog Psych, 27)

4 HEARING LEVEL (db) Participants 19 children with normal hearing 22 children with hearing loss 8 to 12 years of age Mainstreamed at grade level Native speakers of English FREQUENCY (Hz) NHC HIC

5 Methodology Testing 52 db SPL in the free field Data collection Computer interface Digital audio recordings Three visits 1 Unaided session 2 Aided sessions

6 HEARING LEVEL (db) Wide-Band Amplification -2 FREQUENCY (Hz) Unaided Aided

7 HEARING LEVEL (db) Wide-Band Amplification -2 FREQUENCY (Hz) Unaided Aided

8 Wide-Band Amplification Narrowband Wideband Boat Shout Puff

9 HEARING LEVEL (db) Wide-Band Amplification -2 FREQUENCY (Hz) Oticon minialta RITE Unaided Aided

10 Performance (% Correct) Wideband (% Correct) 1. Recognition 1 Unaided Aided-NB Aided-WB 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Narrowband (% Correct)

11 2. Auditory Lexical Decision

12 2. Auditory Lexical Decision Not Real glug Stimulus Real cat

13 Performance (% Correct) Wideband (% Correct) 2. Auditory Lexical Decision 1 Unaided Aided-NB Aided-WB 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Narrowband (% Correct)

14 Performance (% Correct) Errors (%) 2. Auditory Lexical Decision 1 8 Unaided Aided-NB Aided-WB 1% 9% 8% Misperception Ambiguity Misconception NR 6 7% 6% 4 2 Recognition Lexical Decision Task Non- Detection Learning 5% 4% 3% 2% 1% % 26% 12% 9% 2% 8% 4% 18% 16% % 5% 5% % 7% 3% 1% 3% Unaided NB WB NH Listening Conditions

15 3. Non- Detection Cooks make hot foom. (Pittman & Schuett, Ear and Hearing, 213)

16 Performance (% of Total) 3. Non- Detection 1% Misperception 8% Repair 6% 4% Overall performance 2% % NH Groups HL OVER UNDER CORRECT (Pittman & Schuett, Ear and Hearing, 213)

17 Performance (% Correct) Wideband (% Correct) 3. Non- Detection 1 Unaided Aided-NB Aided-WB 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Narrowband (% Correct)

18 Performance (% Correct) Errors (%) 3. Non- Detection 1 Unaided Aided-NB Aided-WB 1% Misperception 8 8% Repair 6 6% 4 4% 32% 2 Recognition Lexical Decision Task Non- Detection Learning 2% % 24% 24% 14% 3% 18% 12% 14% Unaided NB WB NH Listening Conditions

19 4. Rapid Learning Narrowband Wideband

20 PERFORMANCE (%) 4. Rapid Learning TRIALS P c = 1.8e n/c

21 Performance (% Correct) 4. Rapid Learning Overall Learning Unaided NB WB NHC Trials

22 Performance (% Correct) Wideband (Speed) 4. Rapid Learning Overall 1 Unaided Aided-NB Aided-WB Recognition Lexical Decision Task Non- Detection Learning Narrowband (Speed)

23 Performance (% Correct) Wideband (Speed) 4. Rapid Learning 1 Unaided Aided-NB Aided-WB Recognition Lexical Decision Task Non- Detection Learning Narrowband (Speed)

24 The bad news 1. Children with hearing loss lag behind their normal hearing peers. 2. Children with hearing loss tend to repair words they don t know. 3. Children with hearing loss may be missing opportunities to learn new words.

25 The good news 1. Amplification significantly improves listening and learning. 2. Maximizing bandwidth increases listening and learning further. 3. Benefit can go undetected if judged by word recognition testing alone.

26 WHAT ABOUT NOISE?

27 SNR Output for +3dB SNR Input Digital Noise Reduction BROADBAND NOISE DNR Off DNR On Resound Verso 9 Widex Dream 44 Phonak Bolero Starkey 3 Series Siemens Motion 7 Oticon Alta Pro Hearing Aid Manufacturer

28 SNR Output for +3dB SNR Input Digital Noise Reduction MULTI-TALKER BABBLE DNR OFF DNR ON Resound Verso 9 Widex Dream 44 Phonak Bolero Starkey 3 Series Siemens Motion 7 Oticon Alta Pro Hearing Aid Manufacturer

29 Level (db SPL) Digital Noise Reduction 12 1 Starkey 3 Series DNR OFF DNR ON FF Thresholds Frequency (Hz)

30 Performance (% Correct) Noise Reduction On (% Correct) 1. Recognition 1 Unaided Aided-DNR Off Aided-DNR On 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Noise Reduction Off (% Correct)

31 Performance (% Correct) Noise Reduction On (% Correct) 2. Auditory Lexical Decision 1 Unaided Aided-DNR Off Aided-DNR On 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Noise Reduction Off (% Correct)

32 Performance (% Correct) Errors 2. Auditory Lexical Decision Unaided Aided-DNR Off Aided-DNR On 7% 6% 5% 4% 3% 2% 1% 15% 15% 9% 2% 2% % 16% 16% 7% 12% 27% 26% Misperception Ambiguity Misconception NR % 8% 6% 18% Recognition Lexical Decision Task Non- Detection Learning % Unaided DNR-OFF DNR-ON NH Listening Conditions

33 Performance (% Correct) Noise Reduction On (% Correct) 3. Non- Detection 1 Unaided Aided-DNR Off Aided-DNR On 1% 8 8% 6 6% 4 4% 2 2% Recognition Lexical Decision Task Non- Detection Learning % % 2% 4% 6% 8% 1% Noise Reduction Off (% Correct)

34 Performance (% Correct) Errors (%) 3. Non- Detection 1 8 Unaided Aided-DNR Off Aided-DNR On Misperception Repair % % 29% 29% % 23% 24% 19% Recognition Lexical Decision Task Non- Detection Learning Unaided DNR-OFF DNR-ON NH Listening Conditions

35 Performance (% Correct) Performance (% Correct) 4. Rapid Learning Unaided Aided-DNR Off Aided-DNR On Recognition Lexical Decision Task Non- Detection Learning Overall Learning Unaided Off ON Trials

36 The thing about noise 1. Hearing aids make the signal-to-noise ratio worse. 2. DNR differs across manufactures 3. Noise makes learning difficult for everyone. 4. Performance is maintained with DNR despite reduction in overall amplification.

37 CAN CHILDREN MANAGE NOISE?

38 Preference For and Performance with Digital Noise Reduction Hearing Aid Memories 1. DIR off DNR off 2. DIR on DNR off 3. DIR off DNR on 4. DIR on DNR on (Pittman & Hiipakka, 213)

39 Preference For and Performance with Digital Noise Reduction (Pittman & Hiipakka, 213)

40 Competitor: Noise Speech: Front DIR ON DNR OFF DIR OFF DNR OFF PERFORMANCE INITIAL PREFERENCE FINAL PREFERENCE DIR OFF DNR ON DIR ON DNR ON (Pittman & Hiipakka, 213)

41 Competitor: Babble Speech: Back DIR ON DNR OFF DIR OFF DNR OFF PERFORMANCE INITIAL PREFERENCE FINAL PREFERENCE DIR OFF DNR ON DIR ON DNR ON (Pittman & Hiipakka, 213)

42 (Pittman & Hiipakka, 213)

43 Funding: Hearing Industry Research Consortium Arizona Community Foundation Colleagues: Joshua Alexander, Purdue University Visar Berisha, Arizona State University Research Assistants (The Pitt Crew): Elizabeth Stewart Ian Odgear Amanda Willman Tia Mulrooney Ashley Pederson Allison Latto Ethan Light Laura Chenier Ali Laubscher Madalyn Rash