MSD P13038 Hearing Aid Design. Final Review May 10, 2013

Transcription

1 MSD P13038 Hearing Aid Design Final Review May 10, 2013

2 Agenda Project Overview (2) Mechanical Needs & Spec Review (10) Electrical & Computer Needs & Spec Review (10) Budget Review (2) Schedule Review (2) Lessons Learned (2) Opportunities for Future Work (2)

3 Team Members Alissa Anderson (ME) Team Manager Conor Murphy (EE) System Integration Engineer Ronald Dries (CE) Lead Electrical Kelly Murosky (ME) Lead Mechanical Paula Garcia (ID) Secretary Eric Lew (EE) Budget Master Marbella Vidals (ISE) Customer Relations Sarah Brownell Guide Effective Technologies Grant Sponsor

4 Project Goals Overall Goals: - To de-stigmatize hearing aids as medical devices - To provide the hard-of-hearing market with an alternative hearing aid device - Project is to serve as an initial proof of concept for future MSD projects Deliverables: - Device Amplifies Sound - Device allows for rechargeable power - Device is ergonomic and aesthetically appealing

5 Concept Summary battery enclosure microphone sound capture outlet for wires to BTE enclosure 5 way button transfer module round enclosure micro USB connection up = volume up down = volume down right = profile up left = profile down in = power on/off

6 Focus Group & Imagine RIT Survey User comfort (fits users between the 15th and 90th percentile) - Device perception (91% recognized the device as a Bluetooth device) - Physical Satisfaction (texture, shape, color rated as satisfactory) - Overall satisfaction (91.86% would recommend this device to a friend)

7 Ergonomic Model

8 Mechanical Specifications Spec Source Specification Direction Units of measure Marginal Ideal Actual Satisfied? S8 CN11, CN12 Maximum temperature at outside surface of device min of Not Tested Not Tested S9 CN2, CN4, CN11 Range of adult ear size accommodated max percentile 25th to 75th 10th to 90th 15th to 90th Pass S10 CN4, CN6, CN10, CN11 Weight of earpiece min g <15 <12 15 Pass S18 CN9 Attaches to a standard ear tube and ear mold yes/no yes/no yes yes yes Pass S19 CN14 Manufactured cost (estimated) min $ <2000 <1000 $415 Pass

9 IMAGINE RIT Specifications Spec Source Specification Direction Units of measure Marginal Ideal Actual Satisfied? S14 CN3 Percent of surveyed people who identify a picture of the device as something other than a hearing aid. max percent >60 > Pass S15 CN3 Percent of surveyed hard of hearing people who prefer the form of the new device to standard behind the ear hearing aids max percent >50 >75 33 Fail S16 CN3 Percent of surveyed hearing people who would use the device for Bluetooth or music listening max percent >50 > Pass S17 CN11 Percent of surveyed people who feel the device is comfortable to wear max percent >60 >80 33 Fail

10 Electrical Specifications, Round PCB S1 Source Specification Direction CN1 Lowest level of sound detected Units of measure Marginal Ideal Actual Satisfied? min db <60 <30 not recorded Fail S2 CN1 Frequencies amplified max Hz Pass S3 S4 CN1, CN6 CN5 Maximum amplification target db Fail Levels of volume adjustment max levels Fail

11 Round PCB Microphones Pre-Amplification

12 Electrical Specifications, Battery PCB Source Specification Direction Units of measure S5 CN7 Time to charge earpiece min minutes <60 <30 S7 S12 CN7 CN8 Connects to standard USB 2.0 computer port Earpiece battery life at maximum amplification Marginal Ideal Actual Satisfied? Circuit Incomplete target yes/no yes yes yes Pass max hours >16 > Fail Fail

13 Battery Charger PCB Battery Charger Chip

14 CE Slide Code Functionality - Switch Monitoring - Sample signals and convert to the digital domain - Amplify the signals samples - Output the modified signal to the DAC

15 High Customer Needs Rank Description Need Satisfied? CN1 9 The device amplifies sound Yes CN2 9 The device fits most adult ears ages 15-25years Yes CN3 9 The device does not draw attention to the user as a hard of hearing individual Yes CN4 9 The device supports an active lifestyle (stays on the ear during everyday activities and light activities) No CN5 9 The device includes a way for the user to adjust the volume while on the ear Yes CN6 9 The device is safe to use Yes CN7 9 The device is rechargeable by computer USB port Feasible

16 Budget Review Item MSD1 Budget Remaining Budget Notes Evaluation Boards Received Free Eval Boards Microphones Received Free Microphones Microprocessor Amplifier IC Speaker 0 0 Received Free Speakers USB Interface Rechargeable Battery PCB Acoustic Test Stand 0 0 Budgeted for multiple PCB iterations 3D Printing Costs Focus Groups Miscellaneous TOTAL

17 Schedule Review Date Event DRI MET? Jan 29 order proto 1 enclosure Ali YES February 15 Printed Circuit Board (PCB) 1.0 Ordered Conor YES February 18 order proto 2 enclosure Ali NO March 10 order final PCB Conor NO March 18 Order final enclosures for integration Ali YES April 1 Start integration and debug ALL NO April 26 WORKING PROTOTYPE DUE ALL NO May 4 Imagine RIT ALL YES May 10 Final MSD Review (Week 10) ALL YES

18 Objective Project Evaluation Objectives To de-stigmatize hearing aids as medical devices Satisfied Yes! To provide the hard-of-hearing market with an alternative hearing aid device Yes! Project is to serve as an initial proof of concept for future MSD projects Yes! Deliverables Satisfied Device Amplifies Sound Device allows for rechargeable power Yes! Yes! Device is ergonomic and aesthetically appealing Yes!

19 Lessons Learned Optimism is key Product design is a game of compromise & communication Liberal use of break out boards for testing components Always test circuits prior to ordering Printed Circuit Boards Isolate financial purchases from other projects

20 Opportunities for Future Work On Semi RHYTHM R3910 DSP Integration (CE) Bluetooth Integrations (ME, EE, CE) Ergonomic Model (ME, ID) Rechargeable Battery performance and Battery Capacity (EE, ME)

21 BACKUP

22 Customer Needs Rank Description Need Satisfied? CN1 9 The device amplifies sound yes CN2 9 The device fits most adult ears ages 15-25years yes CN3 9 CN4 9 CN5 9 The device does not draw attention to the user as a hard of hearing individual The device supports an active lifestyle (stays on the ear during everyday activities and light activities) The device includes a way for the user to adjust the volume while on the ear yes no Yes CN6 9 The device is safe to use Yes CN7 9 The device is rechargeable by computer USB port Feasible CN8 3 The power in the earpiece should lasts at least 48 non-continuous hours Feasible CN9 3 The device interfaces with a standard tube and ear mold Yes CN10 3 The weight of the device is similar to existing earpieces Yes CN11 3 The device is comfortable to wear No (ergonomic) CN12 3 The device does not generate excessive heat during use or charging CN13 1 The device includes an additional method for toggling between functions (for later use to switch between programs or turn on Bluetooth, etc.) No noticeable heat on bench; not measured Yes CN14 1 The device has a cost similar to current devices when in production Yes