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TheDag  Per Aspera ad Astra  2yr ago (text post)   2187 thread views

Friday Fun Thread for November 11, 2022

Be advised; this thread is not for serious in depth discussion of weighty topics (we have a link for that), this thread is not for anything Culture War related. This thread is for Fun. You got jokes? Share 'em. You got silly questions? Ask 'em.

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This is probably a long shot but about a decade ago I came across some kind of paper that I failed to find it again, which described the cochlea as a constant time, linear space (frquency domain) discrete fourier transform device, and contrasted it with the Fast Fourier Transform. It also talked about how this inspired a design for an electronic spectrum analyser. The device had the same spiral layout as a cochlea but worked at radio frequencies. I don't recall anything else about besides it probably being a PDF and probably being lecture notes, but I found it fascinating and if it rings a bell to anyone here I would really appreciate a link. I would also be interested in any similar works for other organs too. Thanks

A lens does a Fourier conversion: it maps directions (of the incoming rays) into locations (on the focal plane), summing stuff up.

https://physics.stackexchange.com/questions/596774/why-can-a-lens-be-described-by-a-fourier-transform I guess.

That does look like what the presentation I had in mind was talking about. Thank you very much!

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