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Yr9 Sound and Ear

Part 2 of Energy topic on energy, sound and ear, light and eye definitions

TermDefinition
Longitudinal wave A wave produced by particles vibrating parallel to the direction of the wave movement
Transverse wave A wave produced by particles vibrating perpendicular (90o) to the direction of the wave movemet
Amplitude The height of a crest (or trough) of a wave when measured from the rest position
Wavelength The maximum distance between two adjacent/successive crests or troughs
Frequency The number of waves that pass a given point in one second
Sound Vibrations that travel through the air or another medium and can be heard when they reach a person’s ear.
Hertz (Hz) Unit of measurement of frequency
Crest The highest point of a wave
Trough The lowest point of a wave
Pitch Frequency of a sound wave
Loudness Amplitude of a sound wave
Oscilloscope An instrument used to visualise (or graph) the waves
Pinna The outer ear which focuses the sound into the inner ear
Auditory canal The channel that carries the sound focused by the pinna into the ear
Lobule The ear lobe
Semicircular canals The three tube-like and looped structures of the inner ear, that function together function to mainten the sense of balance in the body
Auditory nerve The nerves that carry the signals transferred by the cilia to the brain
Cochlea A coiled tub located in the inner ear
Hammer One of the three smallest bones in your body. This bone receives the sound wave’s vibrations from the ear drum
Anvil One of the three smallest bones in your body. This bone receives the vibration from the hammer
Stirrup One of the three smallest bones in your body. This bone receives vibrations from the anvil and passes it to the cochlea.
Ear drum A stretched membrane that behaves like the skin of a drum
Cilia Thousands of hair-like nerve endings found in the cochlea
Created by: kjsime
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