Re: MCM: Q.1 ("reinifrosch@xxxxxxxx" )


Subject: Re: MCM: Q.1
From:    "reinifrosch@xxxxxxxx"  <reinifrosch@xxxxxxxx>
Date:    Mon, 15 Mar 2010 22:28:53 +0000
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Hello ! I would like to comment on a message posted by Andrew Bell about 20 hours ago: >---Ursprüngliche Nachricht---- >Von: andrew.bell@xxxxxxxx >Datum: 15.03.2010 04:35 >An: <AUDITORY@xxxxxxxx> >Betreff: Re: MCM: Q.1 > >Dear Reinhart: >Let me be brief. [...] >What I'm asking is to please just look at Fig. 7 of Lonsbury-Martin et al. >1987 (JASA 81, 1507), with mind open, and WONDER. >Are you sure it's not resonance? >Andrew. The above-mentioned paper by Lonsbury-Martin et al. (1987) has the title "Repeated TTS exposures in monkeys: Alterations in hearing, cochlear structure, and single-unit thresholds", JASA 81, 1507-1518. "TTS" means "temporary threshold shift". The mentioned exposures were 100-dB pure tones, at many frequencies from 0.4 to 16 kHz. Subjects were three rhesus monkeys. The Fig. 7 mentioned by Bell (see above) exhibits three narrow zones with outer-hair cell lesions at 44.7%, 61%, and 62.5% distance from the apex. Figs. 8 and 9 show similar OHC lesions, at different places, for the other two monkeys. In their discussion section, Lonsbury-Martin et al. have written: "[...] it appears that the low-frequency exposures may have contributed, in some manner, to the development of the high-frequency lesions observed in our subjects. [...]" That 1987 paper by Lonbury-Martin et al. appears interesting to me. It does not, however, contradict my travelling-wave ideas. Reinhart. Reinhart Frosch, Dr. phil. nat., r. PSI and ETH Zurich, Sommerhaldenstr. 5B, CH-5200 Brugg. Phone: 0041 56 441 77 72. Mobile: 0041 79 754 30 32. E-mail: reinifrosch@xxxxxxxx .


This message came from the mail archive
/home/empire6/dpwe/public_html/postings/2010/
maintained by:
DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University