A Absorbers Materials that have the capacity to absorb sound, such as acoustical tile and panels, carpeting, draperies and upholstered furniture. The taking up and holding or dissipating of matter or energy , as a sponge takes up water.
Absorption is the opposite of reflection .
Affected by density and fiber diameter, Z0 is tested in accordance with ASTM C384-58. An air space enclosed on at least five sides which produces specific sound wave characteristics. A typical example is the pipes of a pipe organ, each tuned by virtue of size and length to a specific pitch . The existing surrounding conditions. A non-profit, national technical society which promotes more efficient use of materials by publishing standards covering definitions, test methods, recommended practices and specifications of materials.