I just learned of some further analogies between biological structure and multidriver speaker systems. The little hairs of the inner ear which sense sound vibrations came in three types: long, medium, and short, sensitive to low, mid, and high frequency, respectively. But even more interesting, after the vibrations have been converted to electrical signals and transmitted to the brain via the cochlear nerve, processing of the signal is accomplished in two physically separate areas of the brain, high frequency in one area and low frequency in the other.
