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Programmable Hearing Aid

Programmable Hearing Aid. 2002 년 11 월 11 일. Programmable Hearing Aid. Conventional Hearing aid. Adjustable Parameter Low cut High cut MPO control Gain control ---. Programmable Hearing Aid. Programmable Hearing aid. Many adjustable parameters. HI-pro cable. RS232C

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Programmable Hearing Aid

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  1. Programmable Hearing Aid 2002년 11월 11일

  2. Programmable Hearing Aid Conventional Hearing aid Adjustable Parameter Low cut High cut MPO control Gain control ---

  3. Programmable Hearing Aid Programmable Hearing aid Many adjustable parameters HI-pro cable RS232C Serial port Fitting software

  4. Filter PC AHF Class-D PreAmp AGC-I GC VC n Hearing Program P1 Logic, o m Auxiliary, Hearing Program P2 m Serial o C Interface Hearing Program PT LOTUS-IC T M O S i t Programmer PMC, HiPro, Handheld Programmable Hearing Aid –종류 Number of channel –single channel

  5. Splitband Filter AGC-HP + Class-D Receiver with Clock-Input AHF AGC-LP Hearing Program P1 Hearing Program P2 Programmable Hearing Aid –종류 Number of channel –multi-channel(BILL+TILL) PreAmp with High Level Compressor Logic, Auxiliary, Serial Interface Programmer PMC, HiPro, Handheld S

  6. Silicon Wafer G S D E C B n+ n+ n+ p 음량 조절기 p-well 수화기 n-well 송화기 DSP Sampling Coding Decoding Programmable Hearing Aid –종류 Signal(Analog & Digital) Analog 음량 조절기 수화기 송화기 증폭기 건전지 Digital

  7. Programmable Hearing Aid – Software Common software Noah Program setup & Fitting software install • A common software platform for: • Hearing instrument fitting systems • Diagnostic/measurement systems • Office management applications

  8. Programmable Hearing Aid – Software Common software The Assessment Appointment

  9. Programmable Hearing Aid – Software Common software

  10. Programmable Hearing Aid – Software Common software

  11. Programmable Hearing Aid – Software Common software

  12. Programmable Hearing Aid – Software Common software

  13. Programmable H/A – Fitting Software Individual software Bernafon Danasound Oticon Phonak Siemens Starkey Unitron ---

  14. Programmable H/A – Fitting Software Adjusting Parameters - NH Wide-band frequency response Modification: stepped freq. response 140 140 130 130 120 120 110 110 100 100 90 90 80 70 80 70 Additional LOW tone control Modification: ski-slope response 140 140 130 130 120 120 110 110 100 100 90 90 80 80 70 70

  15. Programmable H/A – Fitting Software Adjusting Parameters - NL Controls the high frequency range Can also be used to control feedback 140 130 120 110 100 90 80 70

  16. Programmable H/A – Fitting Software Adjusting Parameters - others Knee-point Compression ratio Cross over frequency Compression type(In/out put compression, WDRC, ---) Attack/release time Others

  17. Programmable H/A – Fitting Software Fitting formula Linear fitting formula NAL BERGER POGO 1/2., 1/3, 2/3 Non-Linear fitting formula DSL I/O IHAFF FIG. 6 NAL-NL1

  18. Programmable H/A – Fitting Software 실습 • Gain, NH, NL, MPO의 변화 • Compression ratio, Knee-point의 변화 • Crossover frequency의 변화 과제 • NH, NL, MPO, Gain 조절 시, 2cc coupler 값을 측정하고 • 그 조절효과에 대해서 논하세요.(들리는 소리와도 비교) –한개의 item 변화만 check

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