Rail Transit Sound Barrier
category：
Rail Transit Sound Barrier
keyword：
sound
noise
barrier
- DESCRIPTION
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The noise reduction of a sound barrier is related to factors such as the frequency of the noise, the height of the barrier, and the distance between the sound source and the receiving point. The noise reduction effect of 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 200-800Hz. However, for low-frequency sounds around 25Hz, the effect is poor because the sound wave wavelength is relatively long and easily diffracts from above the barrier. Usually, sound barriers can reduce high-frequency sound by 10-15 dB. The height of the sound barrier can be designed based on the distance between the sound source and the receiving point. Doubling the height of the barrier can increase its noise reduction by 6dB. In order to achieve better noise reduction effects, the barrier should be placed as close to the sound source or receiving point as possible.
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