See if the performance of the sound absorbing panel has a test report

In theory, any material has sound insulation, even a thin paper can be soundproof, so many of the products on the market are just very common, manufacturers call it sound-absorbing panels, including gypsum board, magnesium board, silicon Calcium acid boards, wood boards, etc., cause consumers to be easily deceived. One of the most important principles of choosing a sound absorbing panel: whether the sound absorbing panel has an authoritative test report. At present, the most authoritative wall sound insulation detection reporting units in China include the Institute of Architectural Acoustics of Tsinghua University and Tongji University. Many manufacturers in the market are promoting the performance of their sound-absorbing panels, but there is no way to provide authoritative test reports to confirm. All sound-absorbing panels and sound-insulating coatings were tested at Tsinghua University and Tongji University, and an official test report was issued to indicate the sound insulation effect of the wall composed of the sound-absorbing panels. If a sound-absorbing panel advertises its sound insulation performance, but does not provide a formal test report, consumers must be worried. Secondly, it is also necessary to pay attention to whether the sound-absorbing panels sold by the manufacturer and the samples sent for inspection are the same product. If the samples to be inspected are thickened, aggravated, made of different materials or specially treated, and the actual sales of the samples are different products, then the products sold will obviously not reach the sound insulation value indicated in the test report. In this respect, consumers should pay attention to distinguishing the qualifications, credits and goodwill of the manufacturers, and avoid being deceived as much as possible.

Look at the installation of sound absorbing panels is simple

In order to achieve a good sound insulation effect, the installation method of the sound absorbing panel must be very simple, otherwise it is difficult to achieve the desired sound insulation effect. Professional acoustic engineers know that if a wall is tested for soundproofing X-dB in the laboratory, it is often only soundproofed by X-2 decibels in actual engineering, and even the sound insulation effect is lower. There are two main reasons for the wall insulation value of the actual project being lower than the laboratory test value: including the lateral sound transmission problem in the actual project, and the installation quality of the wallboard in the actual project is not as good as the installation quality of the professionals in the laboratory. of. Therefore, the installation of the sound absorbing panel must be simple, otherwise the installation personnel on the site will certainly make mistakes, resulting in the wall sound insulation value not reaching the sound insulation target. For example, elastic crossbars have been used more in the United States. It is a good sound insulation and product. The use of elastic horizontal strips in the laboratory can improve the sound insulation of lightweight plasterboard walls by 5-10 decibels. However, in actual engineering, the installation worker often cannot accurately mount the plate on the elastic cross bar, resulting in a very limited improvement in the actual sound insulation effect of the wall.