Re: AM on sine-wave speech (Tom Carrell )

Subject: Re: AM on sine-wave speech
From:    Tom Carrell  <tcarrell(at)NWU.EDU>
Date:    Thu, 5 Nov 1992 15:17:35 CST

>From chris(at) >My question is: Did Carrell and Opie use always the same AM for all >components of the sine-wave speech? No. We also included a conflicting modulation frequency condition in which the three tones were modulated at three different (prime numbered, to avoid inadvertant comodulation) frequencies. >If so, it would be interesting to >see what happens if either the AM frequency was slighlty modified >(100 Hz versus 105 Hz) or the phase of the AM was randomized between >the different components of sine-wave speech. This would clarify >whether > - The AM helps by broadening the formants, or Nope. > - the AM helps by auditory grouping comodulated sinusoids. Yes. If you have any other questions or comments feel free to email me or Jane Opie (atjmo(at) directly. Tom Carrell tcarrell(at)

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