Subject: Re: A search for a good citation on the relative effects of SNR & overall level for perceiving speech in noise From: "Freed, Dan" <DFreed@xxxxxxxx> Date: Fri, 8 Aug 2008 11:30:42 -0700 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>For a somewhat contrary view, see: Studebaker GA, Sherbecoe RL, McDaniel DM, Gwaltney CA (1999). "Monosyllabic word recognition at higher-than-normal speech and noise levels", JASA 105:2431-2444. Dan Freed Senior Engineer Dept. of Human Communication Sciences & Devices House Ear Institute 2100 W. Third St. Los Angeles, CA 90057 USA Phone: +1-213-353-7084 Fax: +1-213-413-0950 Email: dfreed@xxxxxxxx -----Original Message----- From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx On Behalf Of Hornsby, Benjamin Wade Young Sent: Friday, August 08, 2008 11:19 AM To: AUDITORY@xxxxxxxx Subject: Re: [AUDITORY] A search for a good citation on the relative effects of SNR & overall level for perceiving speech in noise Plomp's work leading to his SRT model would also be relevant. Plomp, R. (1978). "Auditory handicap of hearing impairment and the limited benefit of hearing aids." Journal of the Acoustical Society of America 63(2): 533-549. Plomp, R. (1986). "A signal-to-noise ratio model for the speech-reception threshold of the hearing impaired." Journal of Speech and Hearing Research 29(2): 146-154. Ben -----Original Message----- From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx On Behalf Of James D. Miller Sent: Friday, August 08, 2008 1:09 PM To: AUDITORY@xxxxxxxx Subject: Re: A search for a good citation on the relative effects of SNR & overall level for perceiving speech in noise Hi Stuart, One of the simplest demonstrations is in the classic Hawkins & Stevens paper on the critical ratio (JASA 22, 6-13 (1950)). They had listeners ( maybe just Joe and Smitty) adjust a reading of Adam Smith's Wealth of Nations" (uniformly uninteresting) to the "thresholds of audibility and of intelligibility." The SNR was independent of level over a wide range. The difference between the the two thresholds also remained nearly constant as I recall. There is a nice simple graph in the paper. Jim -- James D. Miller, Ph.D. Principal Scientist Communication Disorders Technology, Inc. Indiana University Research Park 501 N. Morton Street Suite 215 Bloomington, IN 47404 Business Phone: (812)336-1766 Cingular Cell Phone: (812)360-0612 Quoting Stuart Rosen <stuart@xxxxxxxx>: > I would be grateful for some references to work showing what we all > know to be true -- that the primary determinant of performance for > speech in noise for audiometrically normal listeners is the SNR, > depending little or not at all on overall level (at least over a > fairly wide range of moderate levels). > > For those interested, this is a nice study on the extent to which > speech perception is invariant across level for a wide range of > levels: > > USE OF COMFORTABLE LISTENING LEVELS IN SPEECH EXPERIMENTS > Author(s): SIMON, C > Source: JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA Volume: 64 > Issue: 3 Pages: 744-750 Published: 1978 > > Yours - Stuart > > P.S. I hope I am not opening a can of worms here! > > P.P.S. I have done some searching but cannot find anything relevant. > > -- > /*------------------------------------------------*/ > Stuart Rosen, PhD > Professor of Speech and Hearing Science > Speech, Hearing and Phonetic Sciences > Division of Psychology & Language Sciences, UCL > 2 Wakefield Street > London WC1N 1PF > England > > Tel: (+ 44 [0]20) 7679 4077 > Admin: (+ 44 [0]20) 7679 4050 > Fax: (+ 44 [0]20) 7679 4010 > > Email: stuart@xxxxxxxx > > Home page: http://www.phon.ucl.ac.uk/home/stuart > /*------------------------------------------------*/ >