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

Ultrasound

A type of sound wave with frequencies higher than 20 KHz

Not audible to the human ear

Uses

Used to clean jewellery or small intricate items

Definition

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.

Uses

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.

Example

Audible Frequencies

Human

Animals

Speed of Sound

At 0 Degrees Celsius it is 330m/s

Pitch

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

Frequency

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

Amplitude

The greater the amplitude the louder the sound