What is the acoustic impedance or reflection property utilized when designing sound-proof recording studios?

Type: MCQ • Marks: 1

A. Leaving walls bare concrete

B. Using polished marble mirrors

C. Using metal sheets

D. Covering walls with soft porous materials like fiberboard or felt to absorb sound and prevent echo

Explanation

Porous sound-absorbent materials trap acoustic energy, reducing reverberation in studios.

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Class 9th Science (MCQ)

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