广州空压机匠心厂

The noise reduction of noise barrier is related to the frequency of noise, the height of the barrier and the distance between the source and the receiving point.

   声屏障的减噪作用与噪声的频率成分联络很大，对大于2000Hz的高频声比800一1000Hz摆布的中频声的减噪作用要好，但关于25Hz摆布的低频声．则由于声波波长比拟长而很简单从屏障上方绕射过去，所以作用就差。

The noise reduction effect of the noise barrier is closely related to the frequency components of the noise, and the noise reduction effect of the high frequency sound of greater than 2000 Hz is better than that of the medium frequency sound of 800-1000 Hz, but for the low frequency sound of 25 Hz, the effect is worse because the wavelength of the sound wave is relatively long and it is very simple to diffract from above the barrier.

   普通声屏障对高频声可降落l0—15dB。声屏障的高度，可依据声源与接纳点之间的间隔规划，屏障的高度增加一倍，则其减噪量可增加6dB，为了使屏障的减噪作用较好，应尽量使屏障接近声源或接纳点

The normal sound barrier can drop l0 - 15dB to high frequency sound. The height of the noise barrier can be planned according to the distance between the source and the receiving point. If the height of the barrier is doubled, the noise reduction can be increased by 6 dB. In order to make the noise reduction effect of the barrier better, the barrier should be approached to the source or the receiving point as far as possible.

   1.声波 大家把能招致听觉的机械波称为声波（音频）。频率在20~20000Hz之间。

1. sound waves are called mechanical waves that can cause hearing. The frequency is between 20~20000Hz.

   2.次声波 频率低于20Hz的机械波称为次声波。

The 2. wave of mechanical waves less than 20Hz is called infrasonic wave.

   3.超声波 频率高于20000Hz的机械波称为超声波。

3. the mechanical wave of ultrasonic frequency higher than 20000Hz is called ultrasonic wave.

   4.纵波 媒质中质点沿传达方向运动的波。

4. the wave of a particle moving in the direction of propagation in a P-wave medium.

   5.横波 媒质中的质点都是笔直于传达方向而运动的波。

5. the particles in shear wave media are waves moving directly in the direction of transmission.

   6.外表波 沿媒质外表层传达，幅值随深度矫捷削弱的波。

6. the surface wave propagates along the outer surface of the medium, and the wave amplitude is weakened with depth.

   7.平面波 波阵面为平面县与传达方向笔直的波。

7. the plane wave front is the straight wave of the plane county and the direction of transmission.

   8.柱面波 波阵面为同轴柱面的波。

The 8. cylindrical wave front is a coaxial cylindrical wave.

   9.球面波 波阵面为同心球面的波。声屏障首要用于高速公路、高架复合路途、城市轻轨地铁等交通市政设备中的隔声降噪、操控交通噪声对临近城市区域的影响，也可用于工厂和其它噪声源的隔声降噪。

9. the spherical wave front is a concentric spherical wave. Sound barrier is mainly used in highway, elevated compound road, urban light rail subway and other traffic and municipal equipment noise insulation and noise reduction, control the impact of traffic noise on adjacent urban areas, but also can be used in factories and other noise sources noise insulation and noise reduction.

   声屏障分为纯隔声的反射型声屏障，和吸声与隔声相分离的复合型声屏障，后者是更为有效的隔声做出来的。大多数的声屏障都选用吸声和隔声混合型的商品，该型商品的特性是对路途噪声的发作和传送特征有关于性地操控。

Sound barrier is divided into pure sound insulation reflective sound barrier, and sound absorption and sound insulation separated from the composite sound barrier, the latter is more effective sound insulation. Most of the noise barriers are made up of a mixture of sound absorption and sound insulation, which is characterized by the control of the occurrence and transmission of road noise.

   如轿车与路途抵触声或机车与轨迹抵触声在路途下部，声响有经过屏体上部绕射的特征，所以在规划上选用上下吸声，中间隔声的构造，这样可以有效地削弱噪声的绕射；声屏障的中心运用通明的反射型隔声板，能有效地中缀声波的传达途径；同时也为司机和居民供应一个开阔的视界环境。建筑声学范畴，经过声学管理，操控混响时间及室内声环境，称心专业场馆需求。

If the car and the road collision or locomotive and track collision in the lower part of the road, the sound has the characteristics of diffraction through the upper part of the screen, so in the planning to choose the upper and lower sound absorption, the middle sound insulation structure, which can effectively weaken the noise diffraction; the center of the sound barrier using a clear reflective sound barrier, can effectively in The transmission of sound waves is also a way of providing a wide range of visual environment for drivers and residents. Architectural acoustics, through acoustics management, control reverberation time and indoor acoustic environment, meet the needs of professional venues.