> do human ear canals vary that much to need a mic? Not an expert in human ear canals, but over the years I've learned that if I am looking into a field that I

> do human ear canals vary that much to need a mic? Not an expert in human ear canals, but over the years I've learned that if I am looking into a field that I am not familiar with, it's always more complicated than I expected/imagined. > "dumb" adaptive EQ that companies like bose/ikea etc do (Basically turn up base at low volumes, down at high volume to not clip) Sounds like a compander for the lower frequencies. That's technically "adaptive" to the input audio, but not adaptive to the acoustics of the output environment. I expect that to for the second type of adaption, you'd need to measure it, which would necessitate some sort of input, such s a mic.