Music & Acoustics
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Sabine Reverberation Time

Time for sound to decay 60 dB in a room.

Formula

RT60=0.161VART_{60} = 0.161\frac{V}{A}

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Variables

RT_{60}Reverb time (s)
VRoom volume (m³)
ATotal absorption (m² sabins)

Example

V=200 m³, A=40: RT = 0.161×5 ≈ 0.8 s

Did You Know?

Wallace Sabine founded architectural acoustics around 1900 while fixing a Harvard lecture hall's terrible echo.

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