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21 terms

Sound Vocabulary

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sound
a disturbance that travels through a medium as a longitudinal wave
compression
where a longitudinal wave presses the medium together
rarefaction
where a longitudinal wave spreads the medium apart
longitudinal wave
a wave in which the particles of the medium vibrate back and forth along the path that the wave travels
outer ear
catches sound
middle ear
transmits the waves inside the ear cavity
inner ear
changes the sound waves into a form our brains can understand
pinna
the part of your ear that acts like a funnel
ear canal
the channel through which sound waves travel
eardrum
a small, tightly stretched, drum-like membrane that vibrates when sound waves enter the ear
cerumen
a waxy substance that coats the inside of the ear canal
Eustachian tube
connects the middle ear to the back of the throat by a small tube
ossicles
three smallest bones of the ear
oval window
the membrane that separates the middle ear from the inner ear
cochlea
a cavity shaped like a snail-shell and filled with liquid
organ of Corti
houses more than 10,000 tiny nerve hairs
auditory nerve
carries impulses from the inner ear to the brain
pitch
a sound is a description of how high or low the sound seems to a person
hertz
measure for frequency
ultrasound
sound waves with frequencies above normal hearing range (above 20,000 Hz)
infrasound
sound waves with frequencies below normal hearing range (below 20 Hz)