Aural Mind Includes a Realm of the Unhearable?

Upon reading the "Human Ears Make Noise" article
by Jennifer Viegas, Discovery News (as noted by
Dante Rosati's recent post),

It occured to me - the similarity between the "regenerative"
and "super-regenerative" radio receivers, which consist
of a very selective [high Q factor of (center frequency)
divided by (bandwidth) of a "bandpass" tuned filter],

and the phenomenon reported below:

<< ... hair bundles — filament-like sensors in the inner ear that are
deflected by sound waves — have been found to vibrate spontaneously, which
can itself produce noise... >>

<< "The sound emitted by our ears is generally a very faint hum, rather
like the crackle of a mistuned radio," Duke told Discovery News. >>

and

<< Researchers once thought that the hair bundles needed a trigger to
respond to incoming sounds. But they now realize that the bundles are ready
at any instant to capture sounds within their range. That explains how ears
not only detect loud noises, but also the faintest whispers. >>

which is entirely consistent with the behaviour of a "regenerative"
or a "super-regenerative" receiver, which is aligned on the verge
of free-running oscillation at its resonant frequency, thus being
"ready to fly" (oscillate) at its resonance with no more than the
"flap of a butterflies wings" (tiny excitation signals which are
coherent in nature, or sinply the result of random noise fluctuations).

Very interesting, J Gill

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