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Q: Which of the following determines the loudness or softness of a sound?
  • A. wave velocity
  • B. oscillation
  • C. frequency
  • D. amplitude
Correct Answer: Option D - Loudness is physiological response of the ear to the intensity of sound. It distinguishes between a loud sound and a soft sound. Loudness depends on two factors : (i) Intensity of sound which is directly proportional to the square of amplitude of the sound wave. (ii) Sensitivity of the ear.
D. Loudness is physiological response of the ear to the intensity of sound. It distinguishes between a loud sound and a soft sound. Loudness depends on two factors : (i) Intensity of sound which is directly proportional to the square of amplitude of the sound wave. (ii) Sensitivity of the ear.

Explanations:

Loudness is physiological response of the ear to the intensity of sound. It distinguishes between a loud sound and a soft sound. Loudness depends on two factors : (i) Intensity of sound which is directly proportional to the square of amplitude of the sound wave. (ii) Sensitivity of the ear.