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equal loudness calculation

To: AUDITORY@xxxxxxxxxxxxxxx
Subject: equal loudness calculation
From: Julian Rohrhuber <rohrhuber@xxxxxxxxxxxxxx>
Date: Tue, 12 Apr 2005 16:25:57 +0200
Delivery-date: Tue Apr 12 10:32:40 2005
Reply-to: Julian Rohrhuber <rohrhuber@xxxxxxxxxxxxxx>
Sender: AUDITORY Research in Auditory Perception <AUDITORY@xxxxxxxxxxxxxxx>

I'm looking for a computationally efficient way to do a frequency
dependent amplitude compensation. The emphasis is much less accuracy
(especially not for different loudness levels) but more a reasonable
approximation - maybe a polynomial.

Any hints?

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