Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83 based; site hou2g.UUCP
Path: utzoo!watmath!clyde!floyd!harpo!eagle!mhuxl!houxm!hou2g!yraurb
From: yraurb@hou2g.UUCP (G.DECKER)
Newsgroups: net.audio
Subject: Fletcher Munson tracking
Message-ID: <225@hou2g.UUCP>
Date: Mon, 9-Apr-84 11:01:19 EST
Article-I.D.: hou2g.225
Posted: Mon Apr  9 11:01:19 1984
Date-Received: Wed, 11-Apr-84 06:43:10 EST
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 12

I think that Suk Lee is correct in stating that the Fletcher Munson curves
shouldn't track instantaneous levels.  I would like to present an example,
however, that lead me to make the suggestion.

Consider a live concert with a average SPL of 90 dB.  Assume the dynamic 
range to be 40 dB.  A given ear's frequency response will exhibit certain
changes between 70 dB and 110 dB.

Now consider playback.  We are listening to the same performance but average
SPL is 80 dB.  Perhaps our given ear's frequency response exhibits a different
change between 60 and 100 dB than it did between 70 and 110 dB.  I was trying
 to suggest a compensation for this .