Sabin (unit of measurement)

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The Sabin is defined as a unit of sound absorption. One square meter of 100% absorbing material has a value of one metric Sabin. The unit is named in honor of Wallace Clement Sabine. The total adsorption in sabins can be calculated by:

A=S1α1+S2α2+...+Snαn=ΣSiαi

where

A = the absorption of the room (m2 sabine)

Sn = area of the actual surface (m2)

αn = absorption coefficient of the actual surface

Source: http://www.engineeringtoolbox.com/sound-propagation-indoor-d_72.html


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