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Portable Controlled-Noise Environment

Portable Controlled-Noise Environment. Amanda Spencer, Jenny Liu, Jennifer Wang Team 34 Final. Need. 12.5 million people have hearing devices in U.S. Standard auditory training compliance very low Improve compliance with new format. Design Requirements. Interfaces with Android smartphone

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Portable Controlled-Noise Environment

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  1. Portable Controlled-Noise Environment Amanda Spencer, Jenny Liu, Jennifer Wang Team 34 Final

  2. Need • 12.5 million people have hearing devices in U.S. • Standard auditory training compliance very low • Improve compliance with new format

  3. Design Requirements • Interfaces with Android smartphone • Permeating noise calculated in real time • Environment with controlled SNR

  4. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  5. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  6. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  7. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  8. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  9. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter headphones and external microphone • USB connecter  internal microphone

  10. Chosen Design • Adapt to user’s headphones • External microphone • Internal microphone • Bent rod attachment • Smartphone interface • Splitter  headphones and external microphone • USB connecter  internal microphone

  11. Mechanical • Bent rod • Splitter • USB connecter • Dual Lock adhesive

  12. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin

  13. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin

  14. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin

  15. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin • Wires secured to frame

  16. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin • Wires secured to frame

  17. Mechanical - Analysis • Bent Rod Requirements • Rigid • Springs back to original shape • Thin • Wires secured to frame • Hypoallergenic

  18. Mechanical - Analysis • Core • Type 304 Stainless Steel • Covering • polyolefin heat shrinkable tubing

  19. Mechanical - Analysis • Calculations

  20. Mechanical - Analysis • Calculations

  21. Mechanical - Analysis • Calculations

  22. Mechanical - Analysis • Calculations • Necessary diameter: 3.26 mm

  23. Mechanical - Details • Core • Type 304 Stainless Steel Rod • 4 mm diameter, 1 m length • McMaster-Carr (1272T13) • $6.45 ea, 1 day lead time • Covering • Flexible Polyolefin Heat-Shrink Tubing • 1/8” diameter after shrinking, 4 ft long • McMaster-Carr (7856K151) • $2.81 ea, 1 day lead time

  24. Mechanical - Details • USB connector • USB Microphone • Planet Headset(USB mic 1) • $59 ea, 3 day lead time ($12.95) • Female-Female USB Coupler • Cable Wholesale (30U1-02400) • $.92 ea, 3 day lead time ($ 12.20)

  25. Mechanical - Details • Splitter • 3.5mm Headset Splitter Adapter • 20 cm length, 9 g weight • StarTech.com (MUYHSMFF) • $10.99 ea, 2 day lead time ($21.06) • Dual Lock • Indoor-Outdoor Dual Lock • 1” wide • 3M (SJ3870) • $12.47/yd

  26. Mechanical - Manufacturing • Rod Bending • ~10 minutes per frame • $52/hour

  27. Mechanical - Manufacturing Unit Cost: $85.68

  28. Electrical • Internal microphone • External microphone • A-weighted filter • Batteries

  29. Electrical - Analysis • A-weighted filter

  30. Electrical - Analysis • A-weighted filter

  31. Electrical - Analysis • Internal Microphone • MP34DT01TR surface-mounting MEMS microphone • External Microphone • CME-1538-100LB electret microphone

  32. Electrical - Analysis • Electret • Sensitivity: -383 dB • Maximum sound: N/A • MEMS • Sensitivity: -263 dB • Maximum sound: 120 dB SPL 94 dB SPL 97 dB peak 120 dB peak

  33. Electrical - Analysis • Power Considerations • Duracell 3 V 180 MAH coin battery

  34. Electrical - Details • Internal Microphone • MP34DT01TR MEMS Microphone • 4mm x 3mm x 1.1mm • 20Hz-20kHz • Digi-Key (497-12016-1-ND) • External Microphone • CME-1538-100LBElectret Condenser Microphone • 4mm d, 2.9mm h • 20Hz-20kHz • Digi-Key(102-2190-ND)

  35. Electrical - Details • PCB Board

  36. Electrical - Manufacturing Total Unit Cost: $77.26 + $85.68 = $162.94

  37. Weight Unit Weight: 94 g • Head Weight: 31 g

  38. Software - Analysis • Run Time • Sound player: 26.85 ms • Loading sound file and preparing to play it • CPU Requirements • 22% CPU usage • Timing

  39. Software - Details • Algorithm/ Flow Diagram

  40. Software - Details • Software Package • Target Version: Android 4.1.2 (API 16) • Lowest Version: Android 2.2 (API 8) • Hardware Requirements: • Sound Card • Audio Jack • USB jack

  41. Software - Demonstration SNR = 24 dB #2 #1 SNR = 1 dB #4 #3

  42. Safety Analysis • High Risk • Sound levels exceeding 130 dB • Electrical exposure to water • Moderate Risk • Injury due to sharp edges • Allergic reaction to rod

  43. Conclusion • Problem Analysis

  44. Conclusion • Problem Analysis • Ethical Considerations

  45. Conclusion • Problem Analysis • Ethical Considerations

  46. Conclusion • Problem Analysis • Ethical Considerations

  47. Conclusion • Intellectual Property • Future Directions

  48. Questions?

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