Introducing how sound barrier products reduce noise

The reason why Sound Barriers have the effect of noise reduction is because of the three principles of reflection, bypassing and transmission of sound waves. When the sound waves from traffic and other noises are transmitted to the sound barrier, the noise waves will be transmitted by the three paths of reflection, bypassing and transmitting, transmitting is the noise transmitted to the sound-receiving point through the sound barrier; reflecting is the noise that is reflected back after reaching the sound barrier to form the acoustic shadow area; and bypassing is the noise that is transmitted to the sound-receiving point bypassing the sound barrier. The noise reduction effect of a sound barrier mainly depends on the distribution of these three sound wave propagation principles.

1. Sound wave reflection of sound barriers

Generally speaking, sound barriers are built parallel to both sides of the road. When vehicles are traveling and make noise, the sound waves of the noise will be reflected many times from both sides of the sound barrier, and at the same time, some of the noise will be consumed by the sound absorbing structure of the sound barrier, so that the noise waves bypassing the top of the Noise Barrier will be reduced, thus achieving the effect of noise reduction of the sound barrier.

2. Sound wave bypassing of the sound barrier

When the noise sound wave reaches the sound barrier, there will be two kinds of situations, the two ends of the sound wave bypassing and the top of the sound wave bypassing. The sound wave that bypasses the sound barrier is smaller than the one that is not blocked by the sound barrier, and the difference of this kind of sound wave is called the attenuation of sound wave bypassing, so as to achieve the noise reduction effect of the sound barrier. If you want to reduce the sound wave bypassing at both ends, you can solve the problem by extending the length of the sound barrier.

3. Sound wave transmission of sound barrier

When noise sound waves penetrate the sound barrier to reach the sound-receiving point, the principle is called sound wave transmission, and whether or not the noise reduction effect can be achieved depends on the frequency of the sound wave, the density of the sound barrier, and the angle of human projection. The sound-absorbing cotton and panels of the sound barrier can effectively block the transmission of sound waves, and the penetration effect of the transmitted sound is negligible, thus achieving the noise reduction effect of the sound barrier.

The above are the three principles of noise reduction of sound barriers, and the sound insulation materials and sound-absorbing materials of sound barriers can effectively block the transmission of sound sources and play a noise reduction effect.