Sound column ( linear array ) - an acoustic system consisting of a large number of identical speakers vertically [1] [2] . A vertical sound column allows you to achieve a fairly narrow radiation pattern in the vertical plane, which is necessary for scoring open areas, and sometimes large enclosed spaces.
Also, a feature of the sound column is the generated waves of a cylindrical shape, in contrast to the waves of a spherical shape created by point sources . The sound pressure level (SPL) of a spherical wave decreases by 6 dB with a 2-fold increase in the distance from the sound source, while cylindrical SPL waves under similar conditions weaken only by 3 dB.
Often, “plastic speakers” are erroneously referred to as computer plastic active speakers and household multi-channel [ specify ] acoustic systems, however, they do not form any directional radiation and waves of a cylindrical shape.
Notes
- ↑ Sound column in TSB
- ↑ Tereshchuk R.M. Semiconductor receiving-amplifying devices (Radio amateur manual) . - Kiev: Naukova Dumka , 1981. - S. 552–553. - 673 p. Archived on March 8, 2010. Archived March 8, 2010 on Wayback Machine