Physics
By reducing the amplitude of the sound wave, its :
- pitch decreases
- loudness decreases
- loudness increases
- pitch increases
Sound
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Answer
loudness decreases
Reason — Loudness is proportional to the square of the amplitude i.e.,
Loudness ∝ (amplitude) 2
So, when a body vibrates with a lesser amplitude, it sends forth a smaller amount of energy.
Hence, the energy received by the ear drum is also small, so the loudness of the sound decreases.
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