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CBSE Class 9 Science Question 15 of 33

Sound — Question 15

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Question

Question 15

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

Answer

Loudness is a physiological response of the ear to the intensity of sound.

The loudness of sound heard by a listener depends on the following factors:

  1. Amplitude — Loudness is proportional to the square of the amplitude.
  2. Distance from source — Loudness varies inversely as the square of the distance from the source.
  3. Surface area of the vibrating body — Loudness depends on the surface area of the vibrating body.