Pinna
Visible part of the ear – the outer folds and the ear lobe; gathers sound waves in and enhances them as they move into the ear canal.

Pitch
Highness or lowness of sound.

Presbycusis
Progressive hearing loss as a result of the aging process.

Profound Hearing Loss
A hearing loss of 90 dB or higher.Individuals with this loss cannot use auditory receptive communication.

Pure Tone
Simple sound wave used in testing hearing.

Pure Tone Audiometry
Hearing test. Tones at specific test frequencies are presented through earphones. The individual's response to these sounds is recorded on an audiogram.