Principle analysis of home noise reduction using sound absorbing panels

Noise reduction of fire-resistant sound-absorbing panels can only reduce the reverberation sound in the indoor sound field, that is, the sound reflected from the wall surface to the receiving point more than once, and can not reduce the direct sound from the sound source, so near the sound source, in the reverberation radius In areas where the direct sound is dominant, the noise reduction measures using fire-resistant sound-absorbing panels will not achieve the desired noise reduction effect. However, if the human voice source cannot use the partitioning measures to take care of it, it is necessary to use the indoor fireproof sound absorbing panel material to reduce noise.

When the indoor sound source is small, the far-field range from the sound source is larger than the reverberation time radius, the fire-absorbing sound-absorbing board material and the fire-absorbing sound-absorbing board structure have the effect of the fire-absorbing sound-absorbing board, and the near-field range close to the sound source is significantly improved. However, when there are many noise sources in the room, each noise source has a reverberation radius and a â€œfree fieldâ€ within the reverberation radius. However, since there are many sound sources and even distribution, the sound sources are directly heard. The sound dominates everywhere, and the effect of noise reduction on the fire-retardant sound-absorbing panel is correspondingly reduced.

If the multi-sound source is concentrated in a certain section of the room, the indoor fire-absorbing panel processing is effective for other parts of the room. However, it should be noted that if the walls of the room are strongly reflective and the fire-resistant sound-absorbing panels are poor, then the reverberation time radius and â€œfree fieldâ€ of each sound source are few, and there will still be reverberation between the sound sources. In the dominant area, fire-resistant sound-absorbing panels are advantageous for noise reduction there. Of course, it depends on whether the sound level of the uniform sound source is basically the same, or there is a prominent high-noise sound source, and the reverberant sound field formed by the high-noise sound source may have a masking effect on other sound sources. Board processing is also useful.

The noise reduction of the fire-retardant sound-absorbing panels of existing houses is only possible when the existing fire-resistant sound-absorbing panels of the monks are poor, that is, the number of fire-resistant sound-absorbing panels or fire-resistant sound-absorbing panels on the wall is very low, and when the reverberation time is long, the fire-resistant sound-absorbing panels can be used to obtain Expected, obvious effect.

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