# Loudness of Sound is Measured in Units of

By BYJU'S Exam Prep

Updated on: September 13th, 2023

The amplitude of the sound wave affects phenomena known as sound loudness. The sound is considered loud if the sound wave’s amplitude is high. In terms of decibels, the loudness of sound is directly proportional to the square of the vibration’s amplitude (dB). Therefore, noise is defined as sounds that are 80 dB or above.

## Answer – Loudness of Sound is Measured in Units of decibels.

The frequency content, duration, and sound pressure level (SPL) of a sound all affect how loud something is perceived to be. We conclude that the loudness of sounds is determined by the strength of sound waves. Decibels (dB) are units used to measure loudness.

The unit of measurement for noise is the decibel (dB). the proportion of something’s sound pressure to its reference pressure. Sone is a measure representing the perceived loudness of a tone at 1000 Hz that is 40 dB above the threshold, with 1 sone being the loudest possible. Phon is a unit of subjective loudness. The loudness of sounds is calculated using the intensity of sound waves. The power of a sound in Watts per square metre of the sound’s coverage is how intense the sound is.

Summary:

## Loudness of Sound is Measured in Units of

Loudness of Sound is Measured in Units of decibels. The loudness of sound depends on the sensitivity of the ear and the intensity of sound.

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