Sound attenuated enclosure
A technology of silent box and shell is applied in the direction of sound-producing equipment, electromagnetic means, instruments, etc., which can solve the problem of low sound insulation and sound absorption effect.
Pending Publication Date: 2021-07-09
南京光声超构材料研究院有限公司
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Problems solved by technology
[0004] Based on this, it is necessary to provide an improved mute box for the problem that the overall sound insulation and sound absorption effect of the traditional mute box is not high.
Method used
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[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0035] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential" and...
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The invention relates to a sound attenuated enclosure. The sound attenuated enclosure comprises a first shell; a second shell, which is located in the first shell, wherein the space between the second shell and the first shell is filled with a sound insulation material structure; and a detection chamber, which is arranged in the second shell, wherein the space between the detection chamber and the second shell is filled with a super-structure sound absorption material structure and a porous sound absorption material structure. The sound wave incident surface of the super-structure sound absorption material structure faces the detection chamber, and in a preset frequency band, the combined acoustic impedance formed by superposing the acoustic impedance of the super-structure sound absorption material structure and the acoustic impedance of the porous sound absorption material structure is matched with the acoustic impedance of air. According to the sound attenuated enclosure, the full-band sound absorption effect of the sound attenuated enclosure can be effectively improved, and the full-band sound insulation effect of the sound attenuated enclosure is further enhanced.
Description
technical field [0001] The invention relates to the technical field of acoustic noise reduction, in particular to a mute box. Background technique [0002] The mute box is widely used in the noise detection of small electromechanical products, and it is a device that provides a small acoustic mute test space. Compared with traditional anechoic chambers and semi-anechoic chambers, mute boxes, due to their small footprint, high flexibility, and low environmental dependence, well meet the needs of rapid noise detection for small electromechanical products, and will gradually become Necessary supporting equipment for fault detection and quality monitoring on the assembly line. [0003] However, the structure of the traditional mute box is relatively simple, mostly thin-walled steel plates are used as sound insulation components, and traditional porous sound-absorbing materials are pasted inside as sound-absorbing components. The sound insulation and sound absorption effect of ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G10K11/168G10K11/172G01H11/02B32B3/24B32B3/18B32B27/36B32B27/06B32B25/04B32B15/04B32B25/08B32B25/10B32B27/02B32B13/12B32B13/14B32B33/00
CPCG10K11/168G10K11/172B32B3/266B32B3/18B32B27/36B32B27/365B32B27/06B32B25/04B32B15/04B32B25/08B32B25/10B32B5/02B32B13/12B32B13/14B32B33/00G01H11/02B32B2262/0276B32B2307/102B32B2307/10
Inventor 陈建栋黄唯纯颜廷标钱登林钱斯文卢明辉颜学俊李艳
Owner 南京光声超构材料研究院有限公司