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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
Upholstered seats in cinema halls are arranged for:
  • ✓
    Absorption of sound
  • B
    Reflection of sound
  • C
    Diffraction of sound
  • D
    To hear an echo
✓

Answer

Correct option: A.
Absorption of sound
Upholstered seats in cinema halls are arranged for better absorption of sound and to decrease the reverberation time.
In an auditorium or big hall excessive reverberation is highly undesirable. To reduce reverberation, the seat materials are selected on the basis of their sound absorbing properties.

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