Analyses Related to the Hearing

Abstract

We deliver a 20 dB 100 Hz tone for 20 milliseconds. The ear receives it; a low tone has to be enhanced, since such a signal energy is too weak to reach the centre. There are doubts whether here active is only a mechanical amplification through an OHC contraction. For simplification’s sake, assuming 1,500 m/s as the sound speed in fluid, this means two periods of 100 Hz wave within a 20 ms. time, the wave length being 15m. The resonance of the basilaris membrana for such a frequency occurs, in the best case, nearby the cupula. In what way can such a wave length fits on the basilaris membrana (approx. 37 mm)