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Related to acoustic wave: Bulk Acoustic Wave
acoustic waveA pressure wave transmitted through a gas, liquid, or solid as a result of small displacements of the particles in the medium. The medium has elasticity and inertia; when set into motion it undergoes alternate compressions and rarefactions that travel through the medium with a speed characteristic of the medium.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
acoustic wave[ə′küs·tik ′wāv]
An elastic nonelectromagnetic wave that has a frequency which may extend into the gigahertz range; one type is a surface acoustic wave, and the other type is a bulk or volume acoustic wave. Also known as elastic wave.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.