Professional sound insulation glass structure must

Sound insulation must choose the sound insulation glass structure specially designed for the industry of this seminar

with the continuous improvement of people's living conditions, the requirements for the living sound environment are also increasing. In the process of controlling traffic noise pollution, hollow glass windows are vigorously promoted by manufacturers. The insulating glass is composed of two layers of single glass in the middle, with a 9mm air layer in the middle. Due to the special structure of this kind of glass, most consumers will think that insulating glass is sound insulation, but it is not. This starts with the characteristics of the noise source

at present, most of the main noise sources of street residents are traffic noise. The traffic noise sources include three categories: first, the sound of car tires rubbing against the ground. This kind of sound basically belongs to bass and is accompanied by vibration. This situation is particularly serious in the vicinity of concrete roads than asphalt roads. Second, the car engine should not have the phenomenon of slipping, the sound of the exhaust pipe and the car transmission system. The higher the horsepower and the longer the vehicle limit, the stronger the noise in this regard. The third is the sound of vehicle vibration caused by the impact of car horns, wind resistance, brakes, speed bumps and loads. The instrument test shows that the sound pressure level of traffic noise is mainly in the middle and low frequency (below 200Hz), which is also the weakness of ordinary insulating glass sound insulating windows

in our previous work, the structure of empty glass is easy to form low-frequency resonance with traffic noise, and the amount of sound insulation in the low-frequency band is not ideal. According to our test, the maximum amount of low-frequency sound insulation is only 19dB, and the overall sound insulation is less than 30dB. If the outdoor noise is more than 75db, the indoor acoustic environment can be imagined to be very annoying, so professional sound insulation glass structure must be selected for sound insulation

under the internal economic cycle, in April 2021, Dr. Frank Henning, head of the lightweight research direction of China Chengdu Jianbo, expressed his affirmation and praise to Hengrui. He will talk with you about new opportunities in the industry

in 2020, with the outbreak of the global epidemic to the effective control of the prevention and control of the domestic epidemic, the global economic pattern has also undergone great changes, and China is moving forward under the strong strategic deployment of national policies [details]