Generally, for small conference halls with an area of about 100 square meters, if there are carpets, curtains, sofas and other materials with good sound-absorbing effect in the room, there is generally no need to do additional sound-absorbing treatment. For conference halls over 200 square meters, additional sound-absorbing systems are usually required. The sound-absorbing materials in stage audio equipment are divided into:;
Porous materials that attenuate sound waves through many small open channels from the surface to the interior, mainly absorb medium and high frequency sound waves and various fibrous aggregate structures. Organic or inorganic fibers and their products, as well as porous foamed plastics and expanded perlite products.
Flexible materials that absorb sound through resonance (such as closed cell foam, absorbing medium frequency), film materials (such as plastic film or cloth, canvas, linoleum and artificial leather, absorbing low frequency and medium frequency), plates (such as plywood, cardboard, asbestos cement board and gypsum board, absorbing low frequency) and perforated plates (made by punching holes in various plates or metal plates, absorbing medium frequency).
The composite use of the above materials can expand the sound absorption range and improve the sound absorption coefficient. The decorative sound-absorbing board attached to the wall or ceiling, combined with porous materials and perforated board or membrane materials installed on the wall, or even cloud suspension, can improve indoor sound quality and control noise. In addition to absorbing air sound, porous materials can also attenuate the vibration caused by solid sound and air sound.
Filling porous materials into the composite structure composed of various plate materials can improve the sound insulation ability 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 and improve indoor listening conditions; It is used to reduce noise in noisy places and improve living environment and working conditions (see sound absorption and noise reduction); It is also widely used to reduce the noise of ventilation and air conditioning pipes. According to their physical properties and sound absorption methods, sound-absorbing materials can be divided into porous sound-absorbing materials and resonant sound-absorbing structures. The latter includes single resonator, perforated plate resonant sound-absorbing structure, thin plate sound-absorbing structure and compliant material.
Shandong stage lighting and sound manufacturers remind you that when selecting sound-absorbing materials, we should determine the materials that meet the requirements from the perspective of sound-absorbing performance, and also consider the requirements of fire prevention. The dampproof, dampproof, moth proof, strength, appearance and interior decoration of buildings shall be considered and selected together. For more information, please visit www.wenguangzhining.com Com consultation!