### Strutt Help

Reverberant Sound Level (from RT)
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**Strutt|Building Acoustics|Reverberant Sound Level (from RT)** inserts the reverberant sound pressure level into the active row of the worksheet.

The reverberant sound pressure level is calculated using the equation:

`L_(p,rev) = L_W - 10log_10(V) + 10 log_10(T) + 14`

Where:

`L_W` is the source sound power level (dB)

`V` is the room volume (m^{3})

`T` is the room reverberation time

Note that this approach is an approximation for situations where the average room absorption coeffient `alpha_(ave)` is low; for cases where the average room absorption is high, consider using the Reverberant Level (From Room Constant) calculation instead.

References:

- Arup Sound and Vibration in Mechanical Services Design, p28

Comments or suggestions to
strutt@arup.com