Stephane stephhebert at
Sat Sep 4 17:58:39 EST 1999

Hi there,

I'm a computer programmer and I'm building an application for a company who
manufactures hearing aids.

They use different gain calculation methods such as NAL,
According to these methods, some frequencies are said to be interpolated,
like 750 hz and 6Khz.
I've looked into Lagrange's and the Aitken-Neville techniques.

What algorithm or method is used for the interpolation ?
Are there any other known methods to calculate gain ?
Where on the NET can I find more info on technical issues regarding hearing
aids ?


========Stephane Hebert========
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