OT: S/N-Ratio measurment - help

[Magnus Danielson]

From: Martin Czech <martin.czech at intermetall.de>
Subject: Re: OT: S/N-Ratio measurment - help
Date: Thu, 10 Feb 2000 09:37:42 +0100 (MET)

> 
> :::I would say, you also need a filter to get an A-weighted frequency response. 
> Do anybody know of a schematic for such a filter?
> :::
> :::/Jorgen
> :::
> 
> 
> The question was to find a "cheap" and "easy" method.
> I recently found a text about why this a curve is 
> rubbish altogether...

The A, B and C curves are meant as approximations for the hearing curve of the
ear. What most people fail to understand is that you should select curve
depending on the sound pressure level you are measuring.

These curves are to be found in some ANSI standard which number I am too lazy
to dig up for you...

Cheers,
Magnus