Cochlear Mechanics of homo and of other mammals. ("reinifrosch@xxxxxxxx" )


Subject: Cochlear Mechanics of homo and of other mammals.
From:    "reinifrosch@xxxxxxxx"  <reinifrosch@xxxxxxxx>
Date:    Thu, 3 Mar 2011 11:36:59 +0000
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

------=_Part_1782_11667595.1299152219219 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hello! On vocalization I have nothing to say -- but this discussion has made me th= ink of a question related to the mechanics of the mammalian cochlea: In the= basal half of the cochleae of chinchilla, guinea-pig, and gerbil, during a= sine-tone of (high) frequency f the "characteristic place" (place of maxim= al excitation at low sound-pressure level) has been found to be basal of th= e without-liquid resonance place of the basilar membrane [where sqrt(S/M) = =3D 2pi*f; S =3D effective BM stiffness, M =3D effective BM mass surface de= nsity] by about 0.5 one-octave distance. Are there new results on the dista= nce between those two places in homo?=20 Reinhart Frosch, Dr. phil. nat., CH-5200 Brugg. reinifrosch@xxxxxxxx . ----Urspr=C3=BCngliche Nachricht---- Von: robert.zatorre@xxxxxxxx Datum: 02.03.2011 19:55 An: <AUDITORY@xxxxxxxx> Betreff: Re: What animal model provides the closest match to human vocaliza= tion? [...] ------=_Part_1782_11667595.1299152219219 Content-Type: text/html;charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html><head><style type=3D'text/css'> <!-- div.bwmail { background-color:#ffffff; font-family: Trebuchet MS,Arial,Helv= etica, sans-serif; font-size: small; margin:0; padding:0;} div.bwmail p { margin:0; padding:0; } div.bwmail table { font-family: Trebuchet MS,Arial,Helvetica, sans-serif; f= ont-size: small; } div.bwmail li { margin:0; padding:0; } --> </style> </head><body><div class=3D'bwmail'><P><FONT size=3D2>Hello!</FONT></P> <P><FONT size=3D2>On vocalization I have nothing to say -- but this discuss= ion has made me think of a question related to the mechanics of the mammali= an cochlea: In the basal half of the cochleae of chinchilla, guinea-pig, an= d gerbil, during a&nbsp;sine-tone of (high) frequency f&nbsp;the "character= istic place" (place of maximal excitation at low sound-pressure level) has = been found to be basal of the without-liquid resonance&nbsp;place of the ba= silar membrane [where sqrt(S/M) =3D 2pi*f; S =3D&nbsp;effective BM stiffnes= s, M =3D effective BM&nbsp;mass surface density] by about&nbsp;0.5 one-octa= ve distance. Are there new results on the&nbsp;distance between those two p= laces in homo?&nbsp;<BR><BR>Reinhart Frosch,<BR>Dr. phil. nat.,<BR>CH-5200 = Brugg.<BR>reinifrosch@xxxxxxxx .<BR><BR></FONT></P> <BLOCKQUOTE><FONT size=3D2>----Urspr=C3=BCngliche Nachricht----<BR>Von: rob= ert.zatorre@xxxxxxxx<BR>Datum: 02.03.2011 19:55<BR>An: &lt;AUDITORY@xxxxxxxx= MCGILL.CA&gt;<BR>Betreff: Re: What animal model provides the closest match = to human vocalization? [...]</FONT></BLOCKQUOTE></div></body></html> ------=_Part_1782_11667595.1299152219219--


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