The basic construction of an acoustical panel includes a sound-absorbing substrate material and a covering of cloth, vinyl, or other material. The first acoustical panels used in “talking picture” theaters employed wood fiber as the sound-absorbing material. Today’s acoustical panels use substrates that are more efficient at absorbing sound and meet modern safety standards. Some panels use two or more substrate layers in one panel to provide special properties. The most widely-used panel consists of a fiberglass board substrate and cloth cover, usually referred to as a POPa “Plain Old Panel.”
How They Work
Acoustical panels control sound by selectively absorbing sound waves, thereby reducing echoes and re-echoes. All of the various substrates absorb sound by trapping it in a labyrinth of fibers or open cells within the material. As sound travels through this maze, it loses energy due to both the travel and the direction changes within the material. Strictly speaking, the energy of the sound wave is converted to heat within the substrate. However, this heat is hardly noticeable or measurable and will not have any effect on a...
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