Highway noise barriers, the amount of noise reduction of highway noise barriers is related to factors such as the frequency of noise, the height of the barrier, and the distance between the sound source and the receiving point. The noise reduction effect of metal sound barriers is closely related to the frequency components of the noise. The noise reduction effect is better for high-frequency sounds greater than 2000Hz than for mid-frequency sounds around 800-1000Hz, but for low-frequency sounds around 25Hz. Since the sound wave has a relatively long wavelength and is easily diffracted from above the barrier, the effect is poor. Generally, metal sound barriers can reduce high-frequency sound by 10-15dB. The height of the metal sound barrier can be designed according to the distance between the sound source and the receiving point. If the height of the metal sound barrier is doubled, the noise reduction can be increased by 6dB. In order to make the metal sound barrier have a better noise reduction effect, it should be Try to keep the metal barrier close to the sound source or receiving point.

Material of metal sound barrier: galvanized sheet, aluminum sheet, color steel sheet, iron sheet, etc.

The thickness of the metal plate: 0.6mm, 0.7mm, 0.8mm, 1.0mm (can be customized according to customer requirements)

Forming thickness: 50cm, 60cm, 80cm, 100cm, etc. (can be customized according to customer requirements)

The color can be customized according to the drawing requirements

The main features of sound-absorbing panels:

1. Large sound insulation: According to GBJ75-1984, GB/T19889.3-2005, the average sound insulation

37dB(A)~43 dB(A).

2. High sound absorption coefficient: According to GB/T20407-2006, the average sound absorption coefficient is 0.90~0.98.

3. Weather resistance: According to HPF (and screen) 149-2003, HPF (and screen) J 144-2004 standard inspection.

4. Resistance performance: it reaches A level according to GB/T8626-2006 standard.

5. Impact resistance: Qualified according to method A in GB/T14153.

6. Anti-change performance: qualified according to GB/T15227.

7. Freeze-thaw resistance: qualified according to HPF (and screen) 149-2003.

8. Light transmittance: qualified according to GB/T2410.

9. Bending and fracture resistance: qualified according to GB/T9341-2008.

10. Waterproof and dustproof, beautiful and economical, advanced structure, easy to update.

(2) Main features of soundproof room (anechoic room):

1. Large sound insulation, 20 dB(A)～70 dB(A).

2. High sound absorption coefficient, sound absorption rate ≥0.85～1.08.

3. It has the functions of high sound absorption, high sound insulation, vibration isolation and heat preservation.

4. Fireproof, waterproof and dustproof. Beautiful and durable, good sealing performance.

5. Humanized design, processing and installation according to user requirements.

(3) Main features of muffler:

1. Large sound insulation, 15 dB(A)～30 dB(A).

2. High sound absorption coefficient, sound absorption rate ≥0.9～0.98.

3. Fireproof, waterproof and dustproof.

4. Design and process according to user requirements.

In the process of sound wave propagation, when it encounters the sound-absorbing and sound-proof board, three phenomena of reflection, transmission and diffraction will occur. Sound barriers can be divided into sound insulation type, sound absorption type and mixed type of the two. Currently, the commonly used type is sound absorption and sound insulation mixed type. According to the form, the sound barrier can be divided into two basic forms: arc and straight flat. Each form can be divided into multiple structural forms. The height of the sound-absorbing board has three standard types: 2000mm, 2500mm, and 3000mm, and the column spacing is 1000mm, 2000mm, and 2500mm. According to the material classification, the sound barrier can be divided into the following categories: metal sound barrier (metal shutters, metal mesh holes), concrete sound barrier (lightweight concrete, high-strength concrete), PC sound barrier, FRP sound barrier, etc. According to different uses, it can be divided into several categories: railway sound barriers, highway sound barriers, urban landscape sound barriers, residential noise barriers, etc.

The sound-absorbing and sound-absorbing panels are mainly composed of two parts: a steel structure column and a sound-absorbing and insulating screen. The column is the main stress member of the sound barrier. It is fixed on the road anti-collision wall or the embedded steel plate beside the track by bolts or welding; The sound board is the main sound insulation and sound absorption component, which is fixed in the H-shaped column groove by high-strength spring clips to form a sound barrier. Noise barriers are mainly used in high-speed railways, highways, viaducts, rail transit, power stations, hospitals, schools, industrial enterprise construction sites and other noise reduction products for acoustic environmental noise control.