Steve,
The cochlea is a small piece of meat, unlike the boney snail it is enclosed in. It is moved by the relative densities of the fluid on both sides including back waves, arising from the motions of the lower window, and also motions carried to it via direct boney conduction from the outside world. I am still wondering about the fluid dynamics of spirals. I imagine that most of the deceleration is happening at bone side, rather than in the middle and that the reflect wave from the walls of the spiral keeps meeting the direct wave from the upper window. When you add the fact that the diameter of the channel is increasing and that there is some reflection back from the lower window, there must be some important transformations of the signal that would make tonotopic representation seem unlikely. N Nick Thompson <mailto:[email protected]> [email protected] <https://wordpress.clarku.edu/nthompson/> https://wordpress.clarku.edu/nthompson/ From: Friam <[email protected]> On Behalf Of David Eric Smith Sent: Tuesday, February 9, 2021 3:58 PM To: The Friday Morning Applied Complexity Coffee Group <[email protected]> Subject: Re: [FRIAM] what complexity science says ... On Feb 8, 2021, at 10:31 PM, <[email protected] <mailto:[email protected]> > <[email protected] <mailto:[email protected]> > wrote: That’s nifty Stephen, So we potentially have at least two sorts of motion that the haircells can detect: motion of the fluid in the channel and motion of the cochlea itself. ? Motion of fluid relative to whatever reference surface anchors the hair cells? I only see one relative motion available. ? How do the cells tell the difference. And why a spiral. https://www.whatsinside.info/bose-wave-radio-3/bose-wave-radio-iii-opened-waveguide-design/ Eric
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