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9th Class Science Sound Question Bank 9th CBSE Science Sound

  • question_answer
               The reverberation time of a hall used for speeches should be very short. Explain why?

    Answer:

       If the reverberation time of a hall is long, then the multiple echoes will interfere with the original sound, Hence, nothing will be heard distinctly. For this reason, the reverberation time of the hall should be very short. 


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