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Question

The siren of an ambulance needs to be a loud and piercing sound. Therefore, its main characteristics should be:

A
High pitch and large amplitude.
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B
Low pitch and large amplitude.
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C
High pitch and small amplitude.
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D
Low pitch and small amplitude.
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Solution

The correct option is A High pitch and large amplitude.
The loudness of sound is directly proportional to the amplitude of the sound wave. So when amplitude increases, loudness of the sound also increases. The piercing nature of sound depends on the pitch of sound. For a loud and piercing sound, the siren needs to be of high pitch and large amplitude.

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