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

2. 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)

3. 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

4. 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

5. outlet for wires to BTE enclosure
Concept Summary
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

6. 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)

7. Ergonomic Model

8. 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

9. Percent of surveyed people who feel the device is comfortable to wear
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
>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

10. 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
Pass S3
CN1, CN6
Maximum amplification
target
85-95 90 22 S4
CN5
Levels of volume adjustment
levels 5 20

11. Round PCB
Microphones
Pre-Amplification

12. 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

13. Battery Charger PCB
Battery Charger Chip

14. 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

15. 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

16. 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

17. 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)

18. 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

19. 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

20. 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)

21. BACKUP

22. 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