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- Path: sparky!uunet!dziuxsolim.rutgers.edu!pilot.njin.net!hubey
- From: hubey@pilot.njin.net (Hubey)
- Newsgroups: comp.speech
- Subject: Edwards book on Phonetics
- Keywords: Kay Elemetrics FFT Power Spectrum
- Message-ID: <Jan.5.01.27.42.1993.3518@pilot.njin.net>
- Date: 5 Jan 93 06:27:42 GMT
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 34
-
-
-
- Hello,
-
- There's a passage in Edwards book Applied Phonetics
- regarding the Power Spectrum. It goes;
-
- "For the consonants, the spectra were derived by... FFT.
- The vowels were analyzed using Linear Predictive Coding. Both
- procedures were done on the Computerized Speech Lab .. by
- Kay Elemetrics. LPC is useful for showing formants for the
- vowels, and FFT allows us to see larger concentrations of
- acoustic energy.""
-
-
- There's a lot of ambiguity here and I'm not sure anymore that
- the figures for the vowels given in the book are really the
- Power Spectrum. Neither am I sure that the ordinate is linear,
- it might be logarithmic. The figures given in the book might
- simply be a moving average of some sorts of the signal FFT.
-
- Has anyone used this machine anywhere ? Are the figures
- really the Power Spectrum ? And is the scale linear or
- logarithmic ? Are the plots really the FFT of the autocorrelation
- of the signal ?
-
- I'd appreciate any answers. I've been trying to find out but
- I don't even know where this company is from.
- --
-
- mark
-
- hubey@amiga.montclair.edu hubey@apollo.montclair.edu
- hubey@pilot.njin.net ...!rutgers!pilot!hubey
-