The middle ear is a small cavity, connected to the outer ear by the tympanic membrane or ear drum, and to the inner ear by the cochlea . Within the cavity are the ossicles , the smallest bones in the body. Sound waves pass along the auditory canal and vibrate the ear drum which in turn vibrates the ossicles. The ossicles concentrate and amplify the sound waves they receive and transmit the vibrations to the cochlea. Processing sound Sound has a number of characteristics which we can differentiate.
Pitch is defined as the frequency of sound.
Different instruments may vary in timbre despite having the same pitch and loudness. The human ear can hear frequencies which from about 20 Hz. to 15 kHz. Despite its usefulness, the ear has not been used to its potential in user interface design. Touch Touch or haptic perception is an important means of feedback. The apparatus of touch differs from that of sight and hearing as it is not localized.