Helmholtz resonator and working method thereof

A working method and resonator technology, which are applied in the fields of instruments, sound-generating equipment, speech analysis, etc., can solve the problem of not being able to widen the anechoic frequency band, and achieve the effect of improving the silencing performance and broadening the silencing frequency band.

Pending Publication Date: 2020-02-04
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a Helmholtz resonator and working method to solve the technical problem that the prior art cannot widen the anechoic frequency band

Method used

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  • Helmholtz resonator and working method thereof
  • Helmholtz resonator and working method thereof
  • Helmholtz resonator and working method thereof

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Embodiment Construction

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0035] Such as Figure 1-4 As shown, the embodiment of the present invention provides a Helmholtz resonator, including: intake pipe 1, main resonance cavity, first neck short tube 2, second neck short tube 3, frequency modulation control module, aperture adjustment Components; the main resonant cavity includes a first resonant cavity 4 open at one end, a fir...

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Abstract

The invention discloses a Helmholtz resonator. The Helmholtz resonator comprises an air inlet pipeline, a main resonance cavity, a first neck short pipe, a second neck short pipe, a frequency modulation control module and an aperture adjusting assembly, wherein the aperture adjusting assembly is arranged in the middle of the main resonance cavity and coaxially connected with the main resonance cavity, and divides the main resonant cavity into a first resonance cavity and a second resonance cavity; one end of the first neck short pipe communicates with the air inlet pipeline, and the other endof the first neck short pipe communicates with the first resonance cavity; one end of the second neck short pipe communicates with the air inlet pipeline, and the other end of the second neck short pipe communicates with the second resonance cavity; the input end of the frequency modulation control module is connected with the pipe wall of the air inlet pipeline and communicates with the interiorof the air inlet pipeline, and the output end of the frequency modulation control module is connected with the aperture adjusting assembly; and the frequency modulation control module is used for collecting the gas frequency in the air inlet pipeline and adjusting the aperture of the aperture adjusting assembly based on the collected gas frequency. Through the structure that aperture adjustment iscarried out by using the common aperture adjusting assembly of the two coupled resonance cavities, the number of resonance peaks can be increased and the noise elimination frequency band can also bewidened.

Description

technical field [0001] The invention relates to the technical field of Helmholtz resonators, in particular to a coupled Helmholtz resonator for frequency extension and frequency modulation and a working method thereof. Background technique [0002] The Helmholtz resonator is widely used because of its simple structure and high noise reduction. However, it still has many disadvantages. First of all, generally speaking, a Helmholtz resonator with only a single resonant cavity can only have one resonant peak, which has certain limitations and cannot meet the noise reduction of a wider frequency band, so combining multiple resonant cavities may be A method to obtain a wider anechoic frequency band, so in order to broaden the range of damping frequencies, multiple Helmholtz resonators are usually used. Secondly, although the Helmholtz resonator with two resonant cavities coupled under the common sidewall can form two resonance peaks, they still have two natural frequencies and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172G10K11/16G10L25/51
CPCG10K11/172G10K11/161G10L25/51
Inventor 赵丹潘伟宸徐啸梅港伟吴维维陆拯礼
Owner JIANGSU UNIV OF SCI & TECH
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