Subject: Re: frequency to mel formula From: "James W. Beauchamp" <jwbeauch@xxxxxxxx> Date: Wed, 15 Jul 2009 20:54:45 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>It would be good if someone could double check the O'Shaugnessy reference, as given by Dan earlier today: >O'Shaughnessy, D. (1978) Speech communication: Human and machine. >Addison-Wesley, New York, page 150. I think the title is actually Speech Communications: Human and Machine. In the archived message http://www.auditory.org/mhonarc/2008/msg00189.html Dan gives the date of the book as 1987, so I'm not sure which is correct. At any rate, it is possible to buy a second edition of the book, which is copyrighted 2000. However, when perusing the Contents and the Index it looks like the page has changed. Pages for 'mel scale' in the Index are 128, 191, and 214. I hope the formula made it. Jim Original message: >From: Dan Ellis <dpwe@xxxxxxxx> >Date: Wed, 15 Jul 2009 15:55:25 -0400 >To: AUDITORY@xxxxxxxx >Subject: Re: [AUDITORY] frequency to mel formula >Comments: To: "James D. Miller" <jamdmill@xxxxxxxx> > >I'm not sure if this is worth discussing on the full list, but... > >After the discussion last year I actually got a hold of the Beranek >1949 book from our library's cold storage, and the reference is wrong. > In the book, Beranek gives empirical values for the Mel scale, but no >equation. Clearly, this reference got mangled somewhere along the >way: there may be a different early Beranek reference, but it isn't >this one. > >I think Fant is the more appropriate reference (for log(1+f/1000)) and >O'Shaugnessy for log(1+f/700). > > DAn.