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KS3 Sound key terms
Terms in this set (34)
The size of vibrations, or the distance a particle vibrates when a wave passes.
The number of vibrations (or the number of waves) per second.
The unit for frequency.
The loudness or volume of a sound.
How high or low a note sounds.
Move backwards and forwards.
The loudness of a sound.
The distance a particle vibrates when a wave passes.
Something that is needed to make things happen or change.
The number of waves passing a point each second.
Any substance through which something travels.
A wave is a way of transferring energy. A sound wave is vibrations in the particles of a solid, liquid or gas, which are detected by our ears and 'heard' as sounds.
Where a sound or other wave begins.
A completely empty space, containing no particles.
The nerve that carries impulse from an ear to the brain.
The range of frequencies that an animal can hear.
The part of the ear that changes vibrations into electrical impulses.
Unit for measuring the loudness of a sound.
The tube in the head that leads to the eardrum.
Ear plugs or covers for the ears that stop loud sounds damaging the ears.
A thin membrane inside the ear that vibrates when sound reaches it.
An electrical signal that travels in the nervous system.
Sound waves with frequencies below 20 Hz, the lower limit of human hearing.
A machine for converting sound waves into changes in electrical current or voltage.
Sound waves with frequencies above 20 000 Hz, the upper limit of human hearing.
We hear a sound again when it reflects off a surface. The reflected sound is called an echo.
Finding prey or obstacles by emitting sounds and listening for the echoes.
To bounce off a surface instead of passing through or being absorbed.
A machine for finding the depth of the sea or finding fish by sending sound waves and listening for the echoes.
To pass through a substance.
A unit used to compare the loudness of different sounds.
device to convert sound into an image of a transverse wave
wave where the particles are pushed and pulled backwards and forwards in the direction of energy travel
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