Physics Waves NUMS 2022
PMDC Verified Question 72 of 125
Loudness of the sound is directly related to
A
Intensity of sound
B
Frequency of sound
C
Wavelength of sound
D
Pitch of sound
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Intensity of sound
Concept:

Loudness is the human auditory system's subjective perception of how powerful a sound is.

Solution:

  • The sensation of loudness is directly governed by the physical energy carried by the wave.


  • Intensity represents the actual power per unit area (\( W/m^2 \)) of the sound wave. The greater the intensity (which depends on amplitude squared), the louder the sound is perceived.


Why other options are incorrect:

Frequency and pitch are related to how "high" or "low" a note sounds, not its volume. Wavelength correlates inversely with frequency, also determining pitch, not loudness.

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