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JAMB Physics 1986 Question 36

Question 36

Sound

Which of the following is true of the loudness of sound? It

  1. A.depends on the square of the amplitude of the vibrating body
  2. B.is proportional to the distance of the observer from the source of the sound
  3. C.is greatest in vacuum
  4. D.is independent of frequency.
Show the answer and explanation

Answer: A (depends on the square of the amplitude of the vibrating body)

Explanation

Loudness depends on intensity, and intensity is proportional to the square of the amplitude.