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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
While designing an auditorium, an engineer uses which of the following points? A: Makes concave back stage: B: Uses sound absorbing materials. C: Reduces reverberation time. D: Increases echo.
  • A
    $A$ and $C$ only.
  • B
    $A, B, C$ and $D.$
  • ✓
    $A, B$ and $C$ only.
  • D
    Only $A$ and $B.$
✓

Answer

Correct option: C.
$A, B$ and $C$ only.

Echo sounds produces by the calculation of area and no. of population in an Auditorium. Engineer’s can’t increases it, because it can be disturb the host or anyone which present in the Auditorium.

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