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Loudness of a sound can be measured by a sound pressure level meter. It belongs to psycho acoustics.
Loudness is a subjective measure, which is often confused with objective measures of sound prtessure such as decibels or sound intensity. Filters such as A-weighting attempt to adjust sound measurements to correspond to loudness as perceived by the average human. However, as the perception of loudness varies from person to person it cannot be universally measured using any single metric. Loudness is also affected by parameters other than sound pressure, including frequency and duration. In acoustics volume is related to amplitude, sound pressure, and dynamics.

There is subjectivly perceived loudness (volume), objectively measured sound pressure (voltage), and theoretically calculated sound intensity (acoustic power).

Scroll down to related links and look at "All about loudness".

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What property of sound describes your awareness of the energy of a sound?

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The loudness of sound is determined by the amplitude or intensity of the sound wave. Greater amplitude or intensity results in a louder sound. The unit used to measure loudness is decibels (dB).


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Loudness is to brightness as sound is to light.


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Is the loudness of a sound is called its intensity?

Yes the loudness of a sound is called its intensity.


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What part of a waveform describes a sound's loudness?

The amplitude of a waveform describes a sound's loudness. The greater the amplitude, the louder the sound.


How does amplitude affect the loudness of a sound?

it is how loud the sound is ^Smartass comment. The real answer: Loudness is determined by the intensity of sound waves.


What is the unit of the loudness of sound?

Loudness is the quality of a sound that is primarily a psychological correlate of physical strength or amplitude. You can try to measure the sound pressure in decibels. Scroll down to related links and look at "Loudness in sones - Wikipedia ", Loudness level in phon - Wikipedia ", and Subjectivly sensed loudness (volume), objectively measured sound pressure (voltage).