comodulation and auditory object formation in sentences (Tom Carrell )

Subject: comodulation and auditory object formation in sentences
From:    Tom Carrell  <tcarrell(at)NWU.EDU>
Date:    Thu, 5 Nov 1992 12:02:33 CST

Auditory Group, I am gratified to see the interest in the Carrell & Opie paper published in the most recent Perception and Psychophysics. We believe that this work is directly related to the recent discussions here on the growing body of work regarding auditory object formation in speech and speech-like signals. As a matter of fact, a couple of weeks ago Pierre Divenyi briefly described his groups work on comodulation masking release and speech perception in noise. This work appears to directly address some of the most important issues raised by Carrrell & Opie and we eagerly await more information from this group (perhaps through this forum?). Although we intend to respond in the Auditory list to some specific questions and comments that have appeared here regarding this work, I'd first like to try a little internetwork feasability experiment. We have work which is related to many of the points brought up here in the past couple of days. However, the relevant papers are, as yet, either unpublished or difficult to obtain. What I'd like to do is make this work available for internet ftp from our laboratory computer. As a start I have made available the chapter, "Acoustical cues to auditory object formation in sentences." This will eventually appear in the book Theories in Spoken Language: Perception, Production, and Development. J. Luce, P. Luce, & Sawusch (Eds.), Ablex Press. (Lord only knows when it will actually get published!) To retrieve the chapter (including figures and sample acoustic stimuli), you should ftp to Login as "archive," password= "guest." The file is available in three formats: 1. Word for Windows (the file's native format). File: AOW4W.ZIP 2. RTF (RTF is readable with a variety of recent Mac and PC word processing programs and retains the formatting, figures, and sounds). File: AORTF.ZIP (an uncompressed AO.RTF file is also there, and very big!) 3. Text format (the figures are separate gif files and the sounds are separate RIFF (well, ok, Microsoft) .WAV format files. File: AOTXT.ZIP You only need one of these files depending on which computer you have. You will also need an "unzipping" program such as pkunzip to decompress the files (with the exception of AO.RTF which is an uncpmpressed ascii file). Note that those of you with recent versions of Word for Windows or Word for the Mac should be able to hear the stimuli and see the figures easily. Others will have to work a little harder to get sound output and figure display. As time permits, I will put a few more papers at -- including a poster presented at ASA a couple of years ago describing the effect of comodulation on sentences presented in a background of multi-speaker babble. I hope this internet experiment turns out to be more useful than frustrating to those of you who try to get these files. Technology does have a way of biting the hand that feeds it. Tom Carrell Communication Sciences & Disorders Northwestern University tcarrell(at)

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