If the amplitude of a sound wave is increased, which of the following happens?

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A The sound becomes louder.
B The sound becomes softer.
C The pitch increases.
D The speed of the sound increases.

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Answer: A. The sound becomes louder.

Loudness of sound is directly proportional to the square of the amplitude of vibration. Higher amplitude creates more pressure in the wave, resulting in a louder sound.

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If the amplitude of a sound wave is increased, which of the following happens?

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