1.3 PLTW Medical Interventions

Intensity

measure of sound waves' powers (determined by amplitude)

Loudness

How humans intercept sound-determined by both frequency and amplitude

Sound

A disturbance that travels through a medium as a longitudinal wave

Outer Ear

Includes pinna and the external auditory canal

Middle Ear

The chamber between the eardrum and cochlea containing the ossicles that concentrate the vibrations of the eardrum on the cochlea’s oval window

Inner Ear

Containing the cochleas, semicircular canals, and vestibular sacs.

Amplitude

Height of a wave

Frequency

Measure of how many waves occur in a given time period

Pitch

How high or low a sound is (determined by frequency)

Cochleas

a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses via sensory hair cells

Cochlear nerve

the branch of the auditory nerve that transmits auditory information from the cochlea to the brain