Subject: Re: frequency to mel formula From: Julius Smith <jos@xxxxxxxx> Date: Fri, 17 Jul 2009 01:04:21 -0600 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Hi Jim, Do you have a feel for why the mel scale is used instead of, say, Bark or ERB scales? Just curious, Julius At 11:11 AM 7/15/2009, James W. Beauchamp wrote: >Dear List, > >On the Wikipedia page > http://en.wikipedia.org/wiki/Mel_frequency_scale > >a formula for computing frequency in terms of mels is given as: > >mel = log(1 + fr/700)*1127 . > >It is easily inverted to fr = 700*exp(mel/1127 - 1) . > >My question is: Where do these formulas come from? I.e., I need >a journal reference for these formulas. > >Thanks much, > >Jim Beauchamp >Univ. of Illinois at Urbana-Champaign "Anybody who knows all about nothing knows everything" -- Leonard Susskind