Bionic sound absorption structure based on conch cavity structure and sound absorption unit plate thereof
A sound absorption and cavity technology, applied in the field of sound absorption and noise reduction, can solve the problems of single sound absorption peak and narrow sound absorption frequency band, and achieve the effect of small thickness, easy optimization and effective use of space
Inactive Publication Date: 2021-07-16
CENT SOUTH UNIV
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[0006] The purpose of the present invention is to provide a bionic sound-absorbing structure and method based on conch cavity structure, so as to mainly solve the above-mentioned problems of single sound-absorption peak value and narrow sound-absorption frequency band
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[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0037] Such as Figure 1-5 As shown, the present invention firstly discloses a bionic sound-absorbing structure based on a conch cavity structure, including a panel 1, a bottom plate 4, a partition 2 and a cavity 3, and the panel 1, the bottom plate 4, the partition 2 and the cavity 3 are all Use materials with a characteristic impedance greater than air. In this embodiment, the diameter D of the panel 1 and the bottom plate 4 is about 100mm, such as resin, nylon, light metal, etc., preferably materials that are resistant to water immersion and high temperature, and the processing technology can be 3D Printing, CNC machining, etc. The size and shape of the panel 1 and the bottom plate 4 are the same, the openings at both ends of the cavity 3 are co...
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The invention discloses a bionic sound absorption structure based on a conch cavity structure and a sound absorption unit plate thereof. The bionic sound absorption structure comprises a face plate, a bottom plate, a partition plate and a cavity, openings in the two ends of the cavity are covered with the face plate and the bottom plate to form a sound absorption cavity, and partition plate holes are formed in the partition plate; the partition plates are arranged in the circumferential direction of the sound absorption cavity so as to divide the sound absorption cavity into a plurality of sub-sound absorption cavities, the adjacent sub-sound absorption cavities are communicated through partition plate holes, and a plurality of micro-penetrating holes are formed in the panel. The sea snail cavity imitating sound absorption structure can achieve smaller thickness and more sound absorption peaks, is simple in structure and low in manufacturing cost, has the advantages of being easy to manufacture and convenient to optimize, and can design structural parameters in a customized mode according to the required frequency. The sea snail cavity imitating sound absorption structure not only has a low-frequency absorption peak, but also has an additional absorption peak at a relatively high-frequency position, so that the space can be utilized more effectively when broadband coupling sound absorption is realized.
Description
technical field [0001] The invention belongs to the technical field of sound absorption and noise reduction, in particular to a bionic sound absorption structure based on a conch cavity structure and a sound absorption unit board thereof. Background technique [0002] In the construction of modern urbanization, with the rapid development of industry, construction and transportation, and the rapid expansion of population density, noise pollution has become one of the three major pollutions faced by human beings, just like air pollution and water pollution. In order to minimize the harm of noise and provide strong protection and protection for working, studying and living environments, noise control must be fully effective, and the noise source and propagation route of the entire system must be considered. Since the last century, a large number of new sound-absorbing materials and structures have been available to reduce the increasingly serious noise pollution. Traditional s...
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IPC IPC(8): E01F8/00
CPCE01F8/0017E01F8/0023E01F8/0029
Inventor 谢素超杨诗晨严宏宇李臻冯哲骏
Owner CENT SOUTH UNIV