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Last edited 01 Mar 2019
The term ‘volume’ generally refers to a measurement of a three-dimensional shape that is enclosed by a closed surface. It is used to specify the amount of space that a substance such as a solid, liquid or gas occupies.
As per the International System of Units (SI), the standard unit of volume is the cubic metre (m³). The cubic metre measurement indicates the volume contained within a cube the edges of which are all 1 m long.
To be able to calculate the volume of simple shapes (e.g. regular, right angled, straight-edged), arithmetic formulae can be used, such as:
Volume = length x width x height
Whereas, more complex shapes require integral calculus if there is a formula for the shape’s boundary.
The term ‘volume’ is also used in relation to sound levels, i.e. how loud or quiet a sound is. The higher the intensity of a sound, the louder it is perceived by the ear, and the higher its volume. Decibels (dB) are most commonly used as a measure of sound volume. The decibel scale gives an approximation of human perception of relative loudness.
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