Subject: Nonlinearity in excitation pattern modeling From: SOREN BUUS <BUUS(at)NEU.EDU> Date: Thu, 12 Jun 1997 13:20:54 -0500On 11-JUN-1997 13:03:25.60 Jont Allen wrote: For some reason Soren's email really gets screwed up when I read it via netscape. Does somebody know how to solve this problem? One point I would like to add to Soren's email. It is essential to us= e a nonlinear cochlear model if you want to match JND and masking data. With out it, the upward spread of masking and two-tone suppression cannot be matched in a realistic way. If you dont get masking right, then yo= u can expect to get loudness right either, as loudness depends critically o= n the masking. Jont -------------------------------- Dear Jont, I agree with you about getting the masking right and using a non-linear model. For excitation- patterns, the level dependence of the auditory filters must be included. Otherwise it won't work.=20 Using Zwicker's old excitation patterns does the same thing. In my mind, either approach is a simple-minded way of taking into account the cochlear non-linearity. I like to keep things simple, so I would tend to think that a full cochlear model is overkill. Moreover, Peter was looking for a model that might be believed by a few more people than its originator. It seems to me that there is no universal agreement about what is a good model of the cochlear mechanics. Thus, basing the excitation patterns on a cochlear model might, to some extent, defeat the purpose. Best wishes, S=BFren