12th Class Biology Sample Paper Biology - Sample Paper-8

  • question_answer
    It is often said that noise level can be reduced by placing the carpets and drapes on the floor or wall surface of the room. If it is true? Give reason.

    Answer:

    Yes, it is true because these materials act as sound absorber and therefore, can reduce the effect of both high and low pitched sounds. For greater effectiveness, these materials should be installed as much close to the noise source as possible.


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