Hazards of noise
We know that noise not only brings us psychological harm, but also psychological harm, it can damage our hearing, affect the human nervous system, make people irritable and irritable. Therefore, people pay more and more attention to the noise control of home decoration when they are interior decoration. As a comfortable system for home life, fresh air has become more and more popular. There are two main sources of fresh air noise: host noise and air duct noise.
The material of acoustical aluminum PET flexible duct
The noise of the air duct is more complicated, the noise generated when the air is discharged from the main engine outlet, the noise generated when the wind is transmitted in the duct, the sound generated by the excessively fast wind speed of the end tuyere, and the noise generated by improper operation of the installation pipe.
In order to reduce the noise generated when the pipeline is arranged, the fresh air industry has also derived a muffler pipe. The muffler pipe generally has multiple layers and is made of different materials. The sound wave is propagated in the porous sound-absorbing material or sound-absorbing structure, so that the noise propagating along the pipe is attenuated with the distance, so as to achieve the purpose of noise reduction. The most common muffler pipe materials are aluminum-plastic composite film, muffler cotton, glass fiber insulation cotton, non-woven fabric (or aluminum foil), PVC, double-sided aluminum foil composite glass fiber cloth.
The structure of acoustical aluminum PET flexible duct
The inner duct of the acoustical is usually a perforated aluminum polyester film, which is based on the frequency spectrum of the jet noise by drilling many small holes on the wall of the single-sided aluminum polyester film or the double-sided aluminum polyester film, if the total area of the nozzles is kept unchanged and many small nozzles are used instead, when the airflow passes through the small holes, the frequency spectrum of the jet noise will move to the high frequency or ultra-high frequency, so that the audible sound component in the frequency spectrum will be significantly reduced, Thereby reducing interference and harm to people.
The insulation layer of the acoustical duct is made of glass fiber insulation cotton, which has many advantages such as flame retardant, non-toxic, corrosion-resistant, small bulk density, low thermal conductivity, strong chemical stability, low moisture absorption rate, and good hydrophobicity. The superior performance of thermal insulation, heat insulation, sound-absorbing materials, has a very good wide range of uses. Plates, felts and pipes made of this material have been widely used in thermal insulation, sound absorption and noise reduction in construction, chemical industry, electronics, electric power, metallurgy, energy, transportation and other fields, and the effect is very good and remarkable.
The jacket of the acoustical duct is made of PVC mesh cloth or non-woven fabric. Compared with the traditional muffler device, the acoustical duct has the advantages of being lightweight, flexible in installation, small in space and easy to connect. It is suitable for high-end office buildings, hotels and other occasions with high noise requirements.
