MSD P13038 Hearing Aid Design Final Review May 10, 2013

Agenda 5.10.13 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)

Team Members 5.10.13 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

Project Goals 5.10.13 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

outlet for wires to BTE enclosure Concept Summary 5.10.13 battery enclosure outlet for wires to BTE enclosure microphone sound capture 5 way button up = volume up down = volume down right = profile up left = profile down in = power on/off round enclosure micro USB connection transfer module

Focus Group & Imagine RIT Survey 5.10.13 - 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)

Ergonomic Model 5.10.13

Mechanical Specifications 5.10.13 Source Specification Direction Units of measure Marginal Ideal Actual Satisfied? S8 CN11, CN12 Maximum temperature at outside surface of device min oF 98 110 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 g <15 <12 15 S18 CN9 Attaches to a standard ear tube and ear mold yes/no yes S19 CN14 Manufactured cost (estimated) $ <2000 <1000 $415

Percent of surveyed people who feel the device is comfortable to wear IMAGINE RIT Specifications 5.10.13 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 >80 92.06 Pass S15 Percent of surveyed hard of hearing people who prefer the form of the new device to standard behind the ear hearing aids >50 >75 33 Fail S16 Percent of surveyed hearing people who would use the device for Bluetooth or music listening >70 91.8 S17 CN11 Percent of surveyed people who feel the device is comfortable to wear

Electrical Specifications, Round PCB 5.10.13 Source Specification Direction Units of measure Marginal Ideal Actual Satisfied? S1 CN1 Lowest level of sound detected min dB <60 <30 not recorded Fail S2 Frequencies amplified max Hz 300-7000 85-8000 200-8000 Pass S3 CN1, CN6 Maximum amplification target 85-95 90 22 S4 CN5 Levels of volume adjustment levels 5 20

Round PCB 5.10.13 Microphones Pre-Amplification

Electrical Specifications, Battery PCB 5.10.13 Source Specification Direction Units of measure Marginal Ideal Actual Satisfied? S5 CN7 Time to charge earpiece min minutes <60 <30 Circuit Incomplete Fail S7 Connects to standard USB 2.0 computer port target yes/no yes Pass S12 CN8 Earpiece battery life at maximum amplification max hours >16 >48 3.5

Battery Charger PCB 5.10.13 Battery Charger Chip

CE Slide 5.10.13 Code Functionality - Switch Monitoring - Sample signals and convert to the digital domain - Amplify the signals samples - Output the modified signal to the DAC

High Customer Needs 5.10.13 Rank Description Need Satisfied? CN1 9 The device amplifies sound Yes CN2 The device fits most adult ears ages 15-25years CN3 The device does not draw attention to the user as a hard of hearing individual CN4 The device supports an active lifestyle (stays on the ear during everyday activities and light activities) No CN5 The device includes a way for the user to adjust the volume while on the ear CN6 The device is safe to use CN7 The device is rechargeable by computer USB port Feasible

Budget Review 5.10.13 Item MSD1 Budget Remaining Budget Notes Evaluation Boards 600 501 Received Free Eval Boards Microphones 450 Received Free Microphones Microprocessor 50 17.80 Amplifier IC 120 33.21 Speaker Received Free Speakers USB Interface 20 3.06 Rechargeable Battery 160 25.41 PCB 375 200 Budgeted for multiple PCB iterations Acoustic Test Stand 3D Printing Costs 1125 700.74 Focus Groups 70 Miscellaneous 1500 569.43 TOTAL 4600 2611

Schedule Review 5.10.13 Date Event DRI MET? Jan 29 order proto 1 enclosure Ali YES February 15 Printed Circuit Board (PCB) 1.0 Ordered  Conor February 18 order proto 2 enclosure NO March 10 order final PCB March 18 Order final enclosures for integration April 1 Start integration and debug ALL April 26 WORKING PROTOTYPE DUE May 4 Imagine RIT May 10 Final MSD Review (Week 10)

Objective Project Evaluation 5.10.13 Objectives Satisfied To de-stigmatize hearing aids as medical devices Yes! 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

Lessons Learned 5.10.13 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

Opportunities for Future Work 5.10.13 On Semi RHYTHM R3910 DSP Integration (CE) Bluetooth Integrations (ME, EE, CE) Ergonomic Model (ME, ID) Rechargeable Battery performance and Battery Capacity (EE, ME)

BACKUP 5.10.13

Customer Needs 5.1.13 Rank Description Need Satisfied? CN1 9 The device amplifies sound yes CN2 The device fits most adult ears ages 15-25years CN3 The device does not draw attention to the user as a hard of hearing individual CN4 The device supports an active lifestyle (stays on the ear during everyday activities and light activities) no CN5 The device includes a way for the user to adjust the volume while on the ear Yes CN6 The device is safe to use CN7 The device is rechargeable by computer USB port Feasible CN8 3 The power in the earpiece should lasts at least 48 non-continuous hours CN9 The device interfaces with a standard tube and ear mold CN10 The weight of the device is similar to existing earpieces CN11 The device is comfortable to wear No (ergonomic) CN12 The device does not generate excessive heat during use or charging No noticeable heat on bench; not measured CN13 1 The device includes an additional method for toggling between functions (for later use to switch between programs or turn on Bluetooth, etc.) CN14 The device has a cost similar to current devices when in production