acoustic
  • Pertaining to the detection, production, transmission, reception, control, processing, and study of sound, in addition to all phenomena arising from the effects of sound. This contrasts with acoustical, which is all that is related to sound, but not having its physical properties or characteristics. Thus, terms with acoustical should pertain to units, measurement, materials, and devices. Nonetheless, even in technical usage acoustic and acoustical are mostly used synonymously.

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