In concert hall acoustics, it's the opposite of reflection; the Sabin is a unit of it
[DOC] [TLE] Concert Hall Acoustics2008 - Gearslutz [PAR] Concert hall acoustics has received important attention since the search 
described in ... tions shows that if either the Sabine or the Eyring absorbing 
coefficients are known, ... difference in the way successive sound reflections 
involve ... second note is sounded just after 100 ms, its peak energy ...... Units in 
Auditoria, in Proc.