or  acous*ti*cal  adj :  of or relating to the sense or organs of hearing, to sound, or to the science of sounds < apparatus of the ear>  < energy> : as  a  :  deadening or absorbing sound < tile>   b  :  operated by or utilizing sound waves acous*ti*cal*ly adv 
 
 
 
Similar sounding terms:  acustica 
 
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