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प्रश्न
Answer briefly.
What do you mean by an echo?
परिभाषा
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उत्तर
An echo is the repetition of the original sound because of reflection from some rigid surface at a distance from the source of sound.
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Echo, Reverberation and Acoustics
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Sound - Exercises [पृष्ठ १५७]
