characteristic acoustic impedance
characteristic acoustic impedance[‚kar·ik·tə′ris·tik ə′kü·stik im′pēd·əns]
The product of the density and the speed of sound in a medium; it is analogous to the characteristic impedance of an infinitely long transmission line. Also known as intrinsic impedance.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.