1. The raw materials of sound barriers are classified into the following categories: metal sound barriers (metal louvers, metal screen holes), concrete sound barriers (lightweight concrete, high-strength concrete), PC sound barriers, glass fiber reinforced plastic sound barriers, etc.

Second, the noise reduction of the sound barrier is related to the frequency of the noise, the height of the barrier, and the interval between the sound source and the receiving point. The noise reduction effect of the sound barrier has a great relationship with the frequency of the noise. The high frequency sound greater than 2000Hz is better than the intermediate frequency sound of about 800-1000Hz. The noise reduction effect of the sound barrier on high frequency sound is better than that of low frequency sound. Usually, the sound barrier can reduce the high frequency sound by l0-15dB. About the low frequency sound around 25Hz. Then, because the sound wave wavelength is relatively long and it is easy to diffract from the top of the barrier, the noise reduction effect of the sound barrier is poor. The height of the sound barrier can be planned according to the interval between the sound source and the receiving point. The height of the barrier is doubled, and its noise reduction can be increased by 6dB. In order to make the noise reduction effect of the metal sound barrier better, the barrier should be as close as possible to sound source or receiver.

3. Features of sound barrier:

1), the sound insulation is large: the average sound insulation is 36dB.

2), high sound absorption coefficient: uniform sound absorption coefficient 0.85.

3), weather resistance and durability: the product has water resistance, heat resistance, UV resistance, and will not be degraded or abnormal in quality due to changes in rain temperature. The products are made of aluminum alloy coils, galvanized coils, glass wool, and H-steel columns, and the anti-corrosion period of galvanizing treatment is more than 30 years.

4), beautiful: you can choose a variety of colors and shapes to combine, harmonious with the surrounding environment, forming a beautiful landscape.

5) Economy: Prefabricated construction improves work efficiency, shortens construction time, and saves construction costs and labor costs.

6) Convenience: It is installed in parallel with other products, easy to repair and convenient to update.

7) Safety: Both ends of the sound-absorbing panel are connected and fixed with φ6.2 steel wire ropes to prevent secondary damage, resulting in personnel and property losses.

8) Simple: the N series of sound-absorbing panels have the characteristics of light weight, and the mass per square meter is less than 25 kg, which can reduce the load-bearing load of elevated light rails and elevated roads, and can reduce the structural cost