Reverberation is a phenomenon associated with a

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multiple refraction of sound.

multiple reflection of sound.

single refraction of sound.

single reflection of sound.

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UPSC NDA-2 – 2021

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The correct option is B. Reverberation is the persistence of sound in an enclosed space after the sound source has stopped, caused by multiple reflections of sound waves from surfaces within the space.

Reverberation is distinct from a single echo, which is a clearly discernible reflection. Reverberation occurs when reflected sound waves arrive at the listener in rapid succession, blending together and prolonging the original sound. It is a phenomenon resulting from numerous reflections.

Refraction of sound is the bending of sound waves as they pass from one medium to another or through a medium with varying properties (like temperature or density gradients). Single reflection is responsible for echoes or contributes to the overall sound experience in a space. Reverberation time is a key parameter in architectural acoustics, describing how long it takes for sound intensity to decay by 60 dB after the source stops.

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