When should I use Eyring instead of Sabine?

Eyring is often more accurate when average absorption exceeds about 0.2, such as treated studios and offices.

T60 is the time for sound to decay by 60 dB after the source stops, describing perceived reverberance.

Eyring Reverberation Time Calculator

Compare Sabine and Eyring T₆₀ estimates for the same room.

Length (m)

Width (m)

Height (m)

Average absorption coefficient alpha (0.01-0.95)

How the Eyring reverberation calculator works

Enter room length, width, height, and an average absorption coefficient. The tool computes room volume and total surface area, then estimates reverberation time T₆₀ with both the Sabine and Eyring formulas so you can compare results for the same space.

Key terms

T₆₀ - time for sound level to drop 60 dB after the source stops; describes how live or dead a room feels.
Sabine formula - T = 0.161 x V/A; works well in moderately absorbent rooms.
Eyring formula - uses ln(1-alpha); often better when absorption is high (studios, treated rooms).
alpha - absorption coefficient from 0 (reflective) to 1 (fully absorbing).

Frequently asked questions

When should I use Eyring instead of Sabine? Eyring is often more accurate when average absorption exceeds about 0.2, such as treated studios and offices.
What is T60? T60 is the time for sound to decay by 60 dB after the source stops, describing perceived reverberance.