A special tile for walls and ceilings made of mineral, wood, vegetable fibers, cork, or metal. Its purpose is to control sound volume, while providing cover. The sound deadening properties of the tiles depends upon the thickness, density, and volume of the individual panels. Most acoustical ceiling ...
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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.
Found on
https://www.infoplease.com/dictionary/acoustical-tile
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