Subject: Line breaks and evanescent waves (2). From: "reinifrosch@xxxxxxxx" <reinifrosch@xxxxxxxx> Date: Sun, 4 Apr 2010 13:13:28 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>------=_Part_850_28952469.1270386808737 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Dear colleagues, Today I have changed my "Einstellungen" (settings?): I now write E-mails in HTML format. I do not know what that means -- but trial E-mails sent today to my family have been free of unwanted line breaks. More on evanescent waves: They are found in calculations on a two-dimensional model of the cochlear channel with x-independent properties and with negligible viscosity and friction. If the basilar-membrane (BM) stiffness S is greater than M * omega^2 [M = BM surface mass density; omega = 2pi * frequency], then a travelling wave (TW) results. If, however, S is less than M * omega^2, then a standing wave occurs. It is called evanescent, because the expression for the sound pressure contains a factor of exp(-kappa * x), where kappa can be determined from the following equation: kappa * H * tan(kappa * H) = 2 rho * H *omega^2 / [M * omega^2 -S]. Here, rho = liquid density, and H = half-channel height. Is that evanescent wave discussed in a published paper? 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 . ------=_Part_850_28952469.1270386808737 Content-Type: text/html;charset="UTF-8" Content-Transfer-Encoding: 7bit <html><head><style type='text/css'> <!-- div.bwmail { background-color:#ffffff; font-family: Trebuchet MS,Arial,Helvetica; font-size: 12px; margin:0; padding:0;} div.bwmail p { margin:0; padding:0; } div.bwmail table { font-family: Trebuchet MS,Arial,Helvetica; font-size: 12px; } div.bwmail li { margin:0; padding:0; } --> </style> </head><body><div class='bwmail'><P>Dear colleagues,</P> <P> </P> <P>Today I have changed my "Einstellungen" (settings?):</P> <P>I now write E-mails in HTML format. I do not know what</P> <P>that means -- but trial E-mails sent today to my family </P> <P>have been free of unwanted line breaks.</P> <P> </P> <P>More on evanescent waves: They are found in</P> <P>calculations on a two-dimensional model of the </P> <P>cochlear channel with x-independent properties</P> <P>and with negligible viscosity and friction.</P> <P> </P> <P>If the basilar-membrane (BM) stiffness S is greater</P> <P>than M * omega^2 [M = BM surface mass density;</P> <P>omega = 2pi * frequency], then a travelling wave</P> <P>(TW) results. If, however, S is less than M * omega^2,</P> <P>then a standing wave occurs. It is called evanescent,</P> <P>because the expression for the sound pressure</P> <P>contains a factor of exp(-kappa * x), where kappa can </P> <P>be determined from the following equation:</P> <P> </P> <P>kappa * H * tan(kappa * H) </P> <P>= 2 rho * H *omega^2 / [M * omega^2 -S].</P> <P> </P> <P>Here, rho = liquid density, and H = half-channel height.</P> <P> </P> <P>Is that evanescent wave discussed in a published paper?</P> <P> </P> <P>Reinhart.<BR><BR>Reinhart Frosch,<BR>Dr. phil. nat.,<BR>r. PSI and ETH Zurich,<BR>Sommerhaldenstr. 5B,<BR>CH-5200 Brugg.<BR>Phone: 0041 56 441 77 72.<BR>Mobile: 0041 79 754 30 32.<BR>E-mail: reinifrosch@xxxxxxxx . </P></div></body></html> ------=_Part_850_28952469.1270386808737--