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unit 4 science

TermDefinition
stringed instrument an instrument with one or more strings
wind instruments an instrument made of a hollow tube through which air can flow
percussion instruments an instrument that produces a musical sound when hit
sound source an object that produces sound
sound reciever an object that can detect or hear sounds
decibel unit of measurement of sound intensity
pitch how high or low a sound is
volume how loud or soft a sound is
intensity how strongly or softly a sound vibrates
frequency the number of vibrations in one second
pinna the visible part of the ear
auditory canal the tube through which sound travels to the eardrum
ear drum (tympanic membrain) a thin membrane that vibrates she sound waves reaches it
hammer (malleus) a tiny bone that passes vibrations from the ear drum to the anvil
anvil (incus) a tiny bone that passes vibrations from the hammer to the stirrup
stirrup (stapes) a tiny, u shaped bone that passes vibrations from the anvil to the cochlea
cochlea a snail shaped, fluid filled inner ear structural it is lined with cilia (tiny hairs) that move then vibrated and cause a nerve impulse to form (brain signals)
auditory nerve these carry electro-chemical signals from the inner ear (cochlea) to the brain
semi-circular canals three loops of fluid-filled tubes that are attached to the cochlea in the inner ear. they help us maintain our sense of balance.
eustachian tube a tube that connects the middle ear to the back of the nose; it equalizes the pressure between the middle ear and the air outside. when you pop your ears as you are changing altitude (going up a mountain or in an airplane)you are equalizing the psi.
Created by: hynesgang05
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