Digital Hearing Aid Vs Analog

Paul D Dybala dybala at
Fri Oct 3 11:03:16 EST 1997

> I have mixed feeling about the bandpass filters stuff. From a theoritical
> point of view bandpass filtering is a must to overcome frequency aliasing
> before any A/D conversion and then digital processing. 

> Any Hearing Aid Designers comments would be welcomed.

>  Guy Bonneau,                         

Right about the need for the anti aliasing filter, 
but one of the problems
in analog filters is when you filter the output for whatever reason
the analog filter adds distortion to the signal.

With digital filtering you do not have that problem.  

Paul Dybala
dybala at

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