What is loudness of sound? What factors does it depend on?

AcademicPhysicsNCERTClass 9

To do:

To define the loudness of sound and also to mention the factors on which it depends.

Solution:

Loudness of sound:

Loudness is the attribute of sound that determines the intensity of the auditory sensation produced. When the intensity is very small, the sound is not audible; when it is too great, it becomes painful and dangerous to the ear.

Factors on which loudness of sound depends:

Following are the factors on which the loudness of a sound depends:

1. Amplitude of a sound wave:

The loudness of a sound wave depends on its amplitude. The higher the amplitude of a sound wave, the loudness of the sound will be high as shown in the figure below:


2. Amount of energy that initiated the sound wave:

The loudness of a sound wave also depends on the amount of energy that initiated this sound wave. The greater this energy, the higher will be the loudness of the sound.

raja
Updated on 10-Oct-2022 13:23:20

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