Introduction of sound-absorbing materials in stage audio equipment.Sound bar Processor

　　Types of sound-absorbing materials in stage audio equipment: Generally, in small conference halls of about 100 square meters, if there are carpets, curtains, sofas and other materials with good sound-absorbing effect in the room, it is usually not necessary to do additional sound-absorbing treatment. For conference halls above 200 square meters, an additional sound absorption system is usually required. The sound-absorbing materials in stage audio equipment are divided into: 1. Porous materials that attenuate sound waves by means of many small open channels from the surface to the inside, mainly absorbing medium and high frequency sound waves, and various kinds of fibrous aggregated structures. Organic or inorganic fibers and their products, as well as open-cell foamed plastics and expanded perlite products of porous structure. 2. Flexible materials that absorb sound by resonance (such as closed-cell foam, absorb intermediate frequencies), film materials (such as plastic film or cloth, canvas, linoleum and artificial leather, absorb low and intermediate frequencies), plate materials (such as plywood, Hard fiberboard, asbestos cement board and gypsum board, absorb low frequency) and perforated board (made by punching holes in various plate materials or metal plates, absorb medium frequency).

　　The composite use of the above materials can expand the sound absorption range and improve the sound absorption coefficient. Decorative sound-absorbing panels are attached to the wall or ceiling, combined with porous materials and perforated panels or membrane materials on the wall, and even cloud-type suspension can improve indoor sound quality and control noise. In addition to absorbing airborne sound, porous materials can also attenuate vibrations caused by solid sound and airborne sound. Filling the porous material into the composite structure composed of various plate-like materials can improve the sound insulation capacity and reduce the weight of the structure. A material that absorbs incident sound energy. Sound-absorbing materials are mainly used to control and adjust the reverberation time in the room. Sound-absorbing materials eliminate echoes to improve indoor listening conditions; they are used to reduce noise in noisy places to improve living environment and working conditions (see sound absorption and noise reduction) ; Also widely used to reduce the noise of ventilation and air-conditioning ducts. According to their physical properties and sound absorption methods, sound-absorbing materials can be divided into two categories: porous sound-absorbing materials and resonant sound-absorbing structures. The latter include single resonators, perforated plate resonant sound-absorbing structures, thin-plate sound-absorbing structures, and compliant materials, among others.

　　Selection of sound-absorbing materials in stage audio equipment: When selecting sound-absorbing materials, first of all, the materials that meet the requirements should be determined from the perspective of sound-absorbing properties, and at the same time, the requirements of fire prevention, moisture resistance, moth resistance, strength, appearance, and interior decoration of buildings should be combined. Take into consideration the selection.

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