Which of the following determines the loudness or softness of the

Which of the following determines the loudness or softness of the
| Which of the following determines the loudness or softness of the sound?

A. Frequency

B. Wave velocity

C. Amplitude

D. Oscillation

Please scroll down to see the correct answer and solution guide.

Right Answer is: C

SOLUTION

CONCEPT:

  • Sound: The sound is a longitudinal wave in which the particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves. 
  • Loudness: The phenomenon of sound waves that depend on the amplitude and energy of the sound wave is called Loudness.
    • When the amplitude of the sound is large, then the sound wave is considered to be loud.
  1. Frequency: The number of wave cycles happening per second is called frequency.
  2. Amplitude: The maximum amount of displacement of the medium particles from its mean position is called the amplitude of the wave. 
  3. Wavelength: The distance between two adjacent maxima or two adjacent minima of a wave is called wavelength of that wave. It is denoted by λ.
  4. Pitch: The response of the ear to the frequency of sound is called the pitch of the sound.

EXPLANATION:

  • Sound is a wave and a high amplitude wave carries a large amount of energy. It means a low amplitude wave carries a small amount of energy.
  • The loudness of a sound wave is directly proportional to the square of the amplitude of that wave.
  • Thus loudness of the sound produced by a radio increases by increasing the amplitude and vice- versa. Therefore option 3 is correct.

 

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