the collecting or recording of information by sound-detection methods and devices, as for intelligence purposes.
- Acoustical tile
tile made in various sizes and textures from soft, usually fibrous, sound-absorbing material, as wood, cork, or metal, and typically applied to ceilings or walls.
an acoustic engineer. noun an expert in acoustics
pertaining to the sense or organs of hearing, to sound, or to the science of sound. (of a building material) designed for controlling sound. Music. of, relating to, or being a musical instrument whose sound is not electrically enhanced or modified. arranged for or made up of such instruments: an acoustic solo; an acoustic group. […]
noun a fear of noise, sounds Word Origin Greek akoustikos ‘pertaining to hearing’