Reverberation Time

Sabine's Formula

Reverberation time ($T_{60}$) is how long it takes a sound to decay by 60 dB after the source stops. Wallace Sabine derived in 1900:

T_{60} = rac{0.161 cdot V}{A}

• V — room volume (m³)
• A — total acoustic absorption (m² sabins) = $sum( ext{surface area} imes ext{absorption coefficient})$
• $T_{60}$ — reverberation time (s)

What It Means

Examples

Your Task

Implement reverbTime(V, A) returning $T_{60}$ in seconds.