The temperature dependence of the sound absorption coefficient at critical composition
and above critical temperature Tc for the binary mixture nitroethane-isooctane at
5, 7, 10, 15, 21, and 25 MHz frequencies ( f ) is investigated. The frequency dependence
of the absorption coefficient ( ) for the same critical binary mixture at different
temperatures above critical temperature is studied. In addition, the linear relation
of the sound absorption coefficient at critical point ( c)=f 2 versus f