Sunday 3 February, 2008

mechanism of Sound Localisation by Human beings

Human ears are spaced approximately15cm apart.when a sound travels from the left side of the listener, it reaches the left ear before the right ear, i.e., the right ear signal is delayed with respect to left ear signal. For instance, when a 1KHz sound is generated exactly beside the listener, its sound wave reaches each ear with 180 degrees of phase shift.
both the ear signals are subjected to a complicated filtering process,caused by acoustic interaction with the head and the external ear. Humans unconsciously uses the time delay, amplitude difference, and tonal information at each ear to determine the location of the sound.

No comments: