Subject: BM motion From: Fred Herzfeld <herzfeld@xxxxxxxx> Date: Tue, 13 Nov 2007 21:55:31 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Can I get some help with BM motion. The concept of the traveling wave on the BM has been well documented. Now suppose I sit on the BM at a frequency CFm greater than a particular CF. Let the input at the stapes be F1 with a magnitude of A1. I get an output (deflection) at CFm say Def1. If I change the magnitude from A1 to 2*A1 I get an output Def2. Because of the non-linearity the ratio of the outputs is not linearly related to the ratio of the inputs. But suppose the second input is at another frequency say F2 and I adjust its input magnitude so that the deflection at CFm is the same as for the F1 case and in addition. The first case is as if I had two identical inputs at the stapes. In the second case I have two different frequencies at the input each of which gives individually the same deflection. Can I assume that the non linear effects will be the same so that as far as the measurements at CFm are concerned I cannot tell the difference between the two cases ?? My conclusion is that I cannot tell the difference!! Fred -- Fred Herzfeld, MIT '54 78 Glynn Marsh Drive #59 Brunswick, Ga.31525 USA