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Sound Joel Seah 3S2 by Mind Map: Sound Joel Seah 3S2
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Sound Joel Seah 3S2


A type of sound wave with frequencies higher than 20 KHz

Not audible to the human ear


Used to clean jewellery or small intricate items


Sound is a mechanical wae that is an oscillation of pressure transmitted through a solid, liquid or gas, composed of frequencies within the range of hearing and of a level strong enough to be heard, or the sensation stimulated in organs of hearing by such vibrations.


Allows us to be able to communicate properly with each other.

Propagation of Sound

Sound waves are produced when a vibrating object alternately punches and pulls the air adjacent to it, causing small but rapid changes in the air pressure.


Audible Frequencies



Speed of Sound

At 0 Degrees Celsius it is 330m/s


The property that distinguishes sounds is its pitch, which depends on the frequency.


The higher the frequency of a sound, the higher its pitch


The greater the amplitude the louder the sound