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A noise-reducing sound-absorbing layer

A sound-absorbing layer and noise-reducing technology, which is applied in the field of damping noise, can solve problems such as affecting learning work, narrow sound-absorbing frequency band, and disturbing sleep, and achieves improved sound-absorbing performance, excellent thermal conductivity, and a wide and efficient resistive sound-absorbing frequency band Effect

Active Publication Date: 2018-03-30
STATE GRID ZHEJIANG ELECTRIC POWER +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is to affect study and work and interfere with sleep
However, although the resistive sound absorption of a single aluminum fiber board is sufficient to deal with low-frequency noise, the sound absorption frequency band is narrow, and it cannot take into account other frequency bands with higher noise energy.

Method used

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  • A noise-reducing sound-absorbing layer
  • A noise-reducing sound-absorbing layer
  • A noise-reducing sound-absorbing layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Such as figure 1 As shown, in the noise-reducing sound-absorbing layer of the present invention, the sound-absorbing layer includes a hexahedron composed of resonant sound-absorbing components, the surface of the hexahedron perpendicular to the base plane is the keel, and the plane parallel to the base plane of the hexahedron is the resonant sound-absorbing component, and the resonant sound-absorbing component The acoustic component includes a micro-perforated plate 2 , a non-woven fabric 3 , a bicomponent fiber mat 1 and a back plate 4 arranged sequentially from the noise source toward the wall.

[0069] The thickness of the air layer formed by the back plate 4 and the base surface is 180mm.

[0070] The length and width of the micro-perforated plate 2, the two-component fiber mat 1 and the back plate 4 are respectively equal to the parallel surface of the wall, and the length of the non-woven fabric 3 and the parallel surface of the wall is 60% of the length of the mi...

Embodiment 2

[0080] Such as figure 1 As shown, in the noise-reducing sound-absorbing layer of the present invention, the sound-absorbing layer includes a hexahedron composed of resonant sound-absorbing components, the surface of the hexahedron perpendicular to the base plane is the keel, and the plane parallel to the base plane of the hexahedron is the resonant sound-absorbing component, and the resonant sound-absorbing component The acoustic component includes a micro-perforated plate 2 , a non-woven fabric 3 , a bicomponent fiber mat 1 and a back plate 4 arranged sequentially from the noise source toward the wall.

[0081] The thickness of the air layer formed by the back plate 4 and the base surface is 40mm.

[0082] The length and width of the micro-perforated plate 2, the two-component fiber mat 1 and the back plate 4 are respectively equal to the parallel surface of the wall, and the length of the non-woven fabric 3 and the parallel surface of the wall is 80% of the length of the mic...

Embodiment 3

[0092] A noise-reducing and sound-absorbing layer includes a keel and a sound-absorbing component, and the component includes a micro-perforated plate 2, a non-woven fabric 3, a bicomponent fiber mat 1 and a back plate 4 arranged in sequence from the noise source to the wall.

[0093] An air layer with a thickness of 100 mm is formed between the sound-absorbing member and the base surface.

[0094] The length and width of the micro-perforated plate 2, the two-component fiber mat 1 and the back plate 4 are respectively equal to the parallel surface of the wall, and the length and width of the non-woven fabric 3 and the parallel surface of the wall are equal to the length and width of the micro-perforated plate 2. 70% of the width.

[0095] The non-woven fabric 3 is polypropylene fiber cotton with a thickness of 0.6 mm.

[0096] Two-component fiber mat 1 is processed by blending aluminum fibers with a diameter of 40 μm and polyester fibers with a diameter of 40 μm, and the surf...

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Abstract

The invention provides a noise reduction sound absorption layer. The sound absorption layer comprises a keel and a sound absorption component, wherein the component comprises a micro-perforated panel 2, non-woven fabrics 3, a bi-component fiber mat 1 and a back plate 4, which are sequentially arranged along the direction from a noise source to a wall. The sound absorption principle of the noise reduction sound absorption layer couples the effects of bi-component resistive sound absorption and dual-layer resonance sound absorption; low-frequency noise of a substation transformer and a high-voltage reactor is effectively absorbed, and thus the target of reducing sensitive points on the boundary of a transformer substation and sensitive points out of the transformer substation is achieved.

Description

technical field [0001] The invention relates to the field of damping noise, in particular to a noise-reducing and sound-absorbing layer. Background technique [0002] Substation is an important power place. With the acceleration of urbanization, land resources are becoming increasingly scarce, the continuous expansion of cities and the needs of urban power grid transformation, some substations must be built in commercial and residential areas. Because noise not only pollutes the environment and endangers human health, the noise of transformers also affects the normal operation of equipment and the size of the substation's footprint, so it is necessary to reduce transformer noise. [0003] Noise is very harmful to people. People who have been under the influence of noise for a long time often have the following symptoms: one is to affect hearing. The second is to affect study and work and interfere with sleep. The third is to affect cardiovascular function and endocrine sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/162G10K11/172
Inventor 田一李睿卢林金文德章姝俊李靖潘巍巍樊超王广克陈新韩钰马光杨富尧祝志祥程灵陈保安朱全军聂京凯
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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