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Q.

What is the major difference between echo and reverberation?

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Detailed Solution

An echo is a clearly heard repeat of a sound after a noticeable delay, while reverberation is a continuous fading of sound due to many quick reflections.

Feature	Echo	Reverberation
Perception	Distinct second sound	Prolonged tail; no separate repeat
Time gap	> ~0.1 s (human ear separation)	< ~0.1 s; overlaps with original
Distance to reflector	≈ ≥ 17 m (in air)	Many surfaces at various distances
Use/issue	Used in sonar, distance measurement	Important in room acoustics; too much hurts clarity
Control	—	Acoustic treatment: curtains, panels, carpets, diffusers

Tip: Echo is a single, delayed reflection you can separate by ear; reverberation is many fast reflections that blend into a decay.

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