With the continuous improvement of people's living conditions, the requirements for living sound environment are also constantly increasing. In the process of controlling traffic noise pollution, hollow glass windows are widely promoted by manufacturers. Hollow glass is composed of two layers of single glass in the middle, with a 9mm air layer in the middle. Due to the unique structure of this type of glass, most consumers would think that insulating glass is sound insulation, but in fact, it is not. This starts with the characteristics of the noise source.
At present, the main noise source for street residents is mostly traffic noise, which includes three types: first, the sound of car tires rubbing against the ground. This sound is basically low pitched and accompanied by vibrations. This situation is particularly severe on nearby concrete roads compared to asphalt roads. The second is the sound of the car engine, exhaust pipe, and transmission system. The higher the horsepower and the longer the vehicle usage limit, the stronger the noise in this area. The third is the sound of vehicle vibration caused by car horns, wind resistance and braking, speed bumps, and impact of load. Instrument testing shows that the sound pressure level of traffic noise is mainly in the mid to low frequency range (below 200Hz), which is also the weakness of ordinary insulated glass windows.
The structure of insulating glass is prone to low-frequency resonance with traffic noise, and the sound insulation in the low-frequency range is not ideal. After our testing, the maximum low-frequency sound insulation is only 19db, and the overall sound insulation is also less than 30db. If the outdoor noise is above 75dB, the indoor acoustic environment can be imagined to be very troublesome, so to achieve sound insulation, professional soundproof glass structures must be selected.
According to the National Building Materials Testing Center, the sound insulation capacity of the Lance soundproof window is 42 decibels, which can effectively reduce noise at various frequencies, especially low frequencies. For example, the 125HZ noise is reduced by 34 decibels, and the 250HZ noise is reduced by 39 decibels. It is designed specifically for roadside households to perfectly solve the noise problem. Spring sleep cannot be heard, and noise is everywhere. Installing the Lance window, it is quiet and knows a lot.
