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Volume or Loudness

The waveforms...

Question

The waveforms of two sound waves A and B are shown below. Choose the correct statements.

A

A and B are equally loud.

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B

B is louder than A.

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C

A is shriller than B.

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D

Both are equally shrill.

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Solution

The correct options are
B B is louder than A.
D Both are equally shrill.
As it is clear from the given waveforms, the amplitude of B is more than that of A. Hence, B is louder than A. Now, as their frequecies are equal (they complete equal number of oscillations in equal time), they will be equally shrill.

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