Re: Hearing aids power consumption

[Christine Rankovic <rankovic@xxxxxxxxxxxxxxxx>]

See:  Kates, James M. (2008).  "Digital Hearing Aids."  Plural Publishing (www.pluralpublishing.com)

 

In his discussion of power consumption, Kates reports the following for a  typical digital hearing aid (p. 9):

 

Total current drain:  1 mA

Microphone and A/D:  200 uA

Digital processor, associated memory, and D/A :  700 uA

Output amplifier and receiver:  50 uA

 

Christine Rankovic

 

 

----- Original Message -----

From: Yi-Wen Liu

To: AUDITORY@xxxxxxxxxxxxxxx

Sent: Wednesday, December 17, 2008 4:09 PM

Subject: Hearing aids power consumption

Dear all,

We all know that hearing-aid batteries run out quickly. I am wondering whether the battery power is mainly consumed by the digital signal-processing circuitry, or by the analog amplifier and receiver? Does anybody know an approximate percentage, say 60% DSP and 40% analog (just my random guess)?

Best regards,
Yi-Wen Liu
Boys Town National Research Hospital