Hearing Glossary Title
amplitude the loudness of a sound. It is measured in decibels.
anatomy the study of all the parts of an organism
anvil the second of 3 bones in the middle ear, also called the incus.. See ossicles
auditory canal the passage from the outer ear to the middle ear.
auditory nerve the auditory nerve, takes nerve signals from the cochlea and the semicircular canals and makes connections with the auditory areas of the brain. Diagram
auditory receptor cells auditory receptor cells, also called hair cells, are located in the cochlea. Hair cells are not renewed when they die or are damaged
cell the smallest structural unit of an organism that is capable of independent functioning

the coiled inner ear, which is filled with fluid. The cochlea sends sound vibrations to special nerves. Cochlea comes from the Greek word for "snail" and is a coiled structure that makes about two and one-half turns.


the loudness of sound is measured in units called decibels (dB).This is the force of sound waves against the ear. The louder the sound, the more decibels

eardrum the flap of skin between the outer ear and the inner ear. It is stretched tight like the skin of a drum. It is also called tympanum.
Eustacian tube the tube that connects the middle ear to the back of the nose. This tube allows the air pressure in the middle ear to be the same as the air pressure outside the ear.

frequency the number of times a sound vibrates in a second. The higher the frequency, the higher the sound. Frequency is measured n cycles per second (cps), and is called Hertz (Hz).
hammer the first of 3 middle ear bones, also called the malleus. It is connected to the eardrum. See ossicles
inner ear

the part of the ear that takes sound vibrations, turns them into nerve signals and sends them to the brain. The cochlea, with its tiny hairs, and semi circular canals (which help us with our balance) are located here.

middle ear

The hammer, anvil and stirrup are the three tiny bones that make up the middle ear. It is an air-filled area that is behind the eardrum. The middle ear takes sound waves and turns them into vibrations that move to the inner ear.

organ of corti the sensitive element in the cochlea inner ear and can be thought of as the body's microphone. Diagram

the 3 smallest bones in the body, located in the middle ear. They transmit the sound waves from the outer ear to the cochlea.

outer ear includes the pinna and the ear canal
pinnaHand cupping an ear also called the outer ear. It collects sounds before they are funneled into the inner ear.
pitch the frequency of a sound
semi-circular canals three tubes in the inner ear that control balance.
stirrup the third of three bones in the middle ear, also called the stapes. See ossicles
tympanum another word for the eardrum
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