Frequency analysis in the cochlea and the traveling wave of von Békésy.

Certain experimental data are difficult to reconcile with von Békésy's traveling-wave concept as operative at low energy inputs; i.e., at threshold or near-threshold of hearing. These data, ranging from energy-input values to anatomical and psychoacoustic observations, indicate the possibility of alternative or additional modes of molecular transduction. One such mode is proposed, based on experimental evidence.