Color piercing sound-absorbing panels beautiful time-pressure decorative acoustic floor

 Color Color perforated punch-pressure sound-absorbing acoustic panels perforated plate Color color steel pressure plate YX15-225-900 Description: crest height 15mm, the pitch is 225mm, after forming the effective width of 900mm, thickness from 0.3mm to produce -1.00mm, feed width is 1000mm 5 major characteristics of the company's YX15-225-900 colored steel plate 1. Light weight: 2.5-8.6 kg / m 2. insulation 3. High intensity: Smallpox can be used for load-bearing envelope sheet, bending compression; general house without pillars. The bright color (specific color based on the engineering design to build) sound-absorbing panels acoustic panels in classrooms, conference rooms or music room, we often see is equipped with sound-absorbing panels on the walls, the purpose is to go across the sound, in order to avoid interference by outside people. Surface acoustic panels have many holes, after the sound into the hole, the structure will be a bit like a sponge in the inner wall of random reflections, until most of the acoustic energy is consumed, into heat, reaching the effect of noise. Knowledge about the acoustic absorbing sound waves hit the surface of the material after the energy loss of the phenomenon, sound can reduce indoor sound pressure level. Description of sound absorption index is the absorption coefficient a, the ratio can be absorbed by the material on behalf of the incident sound and acoustic energy. Theoretically, if a material is completely reflected sound, then it a = 0; if a material to absorb all the incident sound energy, then its a = 1. In fact, all of a material between 0 and 1, which is not all reflective, it can not all be absorbed. Have different absorption coefficient on different frequencies. People using the absorption coefficient frequency characteristic curve describes the sound absorption performance on different frequencies. In accordance with ISO standards and national standards, the frequency range of acoustic absorption coefficient of the test report is 100-5KHz. The absorption coefficient 100-5KHz of averaging the values ??obtained is the average absorption coefficient, the average absorption coefficient of the material reflects the overall sound absorption performance. Often used in the noise reduction coefficient NRC works roughly evaluated sound absorption performance in the speech frequency range, this value is in 250,500,1K, the arithmetic mean of the four frequencies of sound absorption coefficient 2K material, rounded to the nearest integer to 0.05. NRC is generally believed that the material is less than 0.2 of a reflective material, NRC and other materials is greater than 0.2 was only considered to be sound-absorbing material. When you need to absorb a lot of sound and reverberation time can reduce interior noise, often requires the use of materials with high absorption coefficient. Centrifugal glass wool, rock wool sound-absorbing material, such as a high NRC, 5cm thick glass wool 24kg / m3 of NRC can reach 0.95. There are two ways to measure the sound absorption coefficient, a reverberation chamber method, one is standing wave tube. Sound absorption coefficient measuring sound reverberation chamber method when random incident, that the sound from all directions injected material energy loss ratio