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Acoustic structure and design method thereof

A technology of acoustic structure and resonance sound absorption, applied in the field of acoustics, to achieve the effect of improving sound insulation performance, simple and thin overall structure, and expanding the scope of application

Active Publication Date: 2018-11-20
上海超颖声学科技有限公司
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0006] The problem solved by the embodiments of the present invention is how to design an acoustic structure with a simple and light structure that can effectively solve the problem of low-frequency noise propagation in the two types of paths, the air path and the structural path

Method used

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  • Acoustic structure and design method thereof
  • Acoustic structure and design method thereof
  • Acoustic structure and design method thereof

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Embodiment Construction

[0054] In order to reduce noise, there are various existing noise reduction methods. Placing an acoustic structure between the sound source and the receiver is a commonly used one of these noise reduction methods. The following will be placed between the sound source and the receiver Take the application of the acoustic structure as an example to illustrate the principle of noise elimination.

[0055] figure 1 is a schematic diagram of the application scenario of the noise propagation path and the acoustic structure 2 placed between the sound source 1 and the receiver 3 . Such as figure 1 As shown, the propagation path of the noise emitted by the sound source 1 usually has two paths: one is to propagate through the air path 4 , and the other is to propagate through the structural path 5 . Both paths can cause the structural vibration of the placed acoustic structure 2 near the receiver 3 , thereby generating vibroacoustic radiation 6 , which is finally transmitted to the rec...

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Abstract

The invention relates to an acoustic structure and a design method thereof. The acoustic structure includes a perforated plate layer, a resonance type metamaterial layer and a back plate layer which are sequentially disposed, wherein a first cavity is formed between the perforated plate layer and the resonant type metamaterial layer, a second cavity is formed between the resonant type metamateriallayer and the back plate layer, a first resonant sound absorber is formed between the perforated plate layer and the first cavity, a second resonance sound absorber is formed between the resonance type metamaterial layer and the second cavity, if the second resonant sound absorber is in a resonant state, the vibration response amplitude of the back plate layer is close to zero. The acoustic structure is advantaged in that the acoustic structure is simple and thin in structure and is easy for assembling and maintenance.

Description

technical field [0001] Embodiments of the present invention relate to the field of acoustics, and in particular to an acoustic structure and a design method thereof. Background technique [0002] Most of the noise encountered in daily life is mechanical noise, and its energy is mostly concentrated in the low frequency band within 1000Hz. These mechanical noises usually reach the receiver by two types of propagation paths, namely the air path and the structure path. An effective noise reduction method is to place acoustic structures between the sound source and the receiver, such as the casing of power equipment, barriers along traffic lines, and screens and sound insulation walls of residential buildings. [0003] In view of the noise transmission problem of the air path, the acoustic structure involved needs to have excellent sound absorption and sound insulation performance, so as to absorb and isolate as much as possible the transmitted noise and reduce the noise level r...

Claims

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Application Information

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IPC IPC(8): G10K11/172G10K11/178
CPCG10K11/172G10K11/178
Inventor 刘新刚
Owner 上海超颖声学科技有限公司
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