Freely combined shutter type underwater sound absorption unit structure
A louvered, unit-structured technology, which is applied to sound-producing instruments, instruments, layered products, etc., can solve the problems of increased wavelength and limited size, and achieve the effects of reducing reflection and scattering, high degree of freedom of combination, and easy processing.
Inactive Publication Date: 2013-09-18
HARBIN ENG UNIV
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Problems solved by technology
However, as the frequency of the sound wave decreases, the wavelength increases, and the size of the experimental pool is limited, so that the pulse acoustic technology is limited by the frequency, and there is a lower limit for the use of low frequencies.
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine Figure 1~5 , the present invention includes a sound-absorbing blade, a sound-absorbing substrate, a dovetail-shaped mounting key, a dovetail-shaped mounting groove, and a mounting substrate. The dimensions are consistent to facilitate combined installation. The sound-absorbing blades, sound-absorbing substrates, dovetail-shaped mounting keys, and dovetail-shaped mounting grooves are all made of rubber with good sound-absorbing performance. The sound-absorbing blades, sound-absorbing substrates, and dovetail-shaped The installation key and the dovetail-shaped installation groove are processed by a mould, and the installation substrate is made of PVC material.
[0020] The sound-absorbing blade has a width of 40-60mm and a thickness of 2-4mm, the sound-absorbing substrate has a width of 30-50mm and a thickness of 6-10mm, and the structural length of...
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Abstract
The invention aims at providing a freely combined shutter type underwater sound absorption unit structure, comprising a mounting base plate, a sound adsorption base plate and a sound adsorption blade; the sound adsorption base plate is fixed on the mounting base plate; the sound adsorption blade is mounted on the sound adsorption base plate to form a sound adsorption unit together with the sound adsorption base plate; the sound adsorption blade divides the sound adsorption base plate into two sides A and B; an angle of 45 degrees is formed between the A side of the sound adsorption base plate and the sound adsorption blade; a downward dovetail-shaped mounting slot is arranged on the A side of the sound adsorption base plate; an upward dovetail-shaped mounting slot is arranged on the B side of the sound adsorption base plate; and the sound adsorption units can be mounted together in a match mode by respective dovetail-shaped mounting slots. The freely combined shutter type underwater sound absorption unit structure can be used for absorbing sound wave energy underwater, is capable of effectively absorb sound wave energy in a certain frequency band range and reducing the reflection and scattering of the sound wave, and has the advantages of high freely combined degree, easiness in processing and implementation, simplicity and convenience in mounting, firmness and reliability.
Description
technical field [0001] The invention relates to a sound-absorbing device, in particular to an underwater sound-absorbing device. Background technique [0002] The commonly used sound absorption methods in underwater acoustic engineering are material sound absorption and structural sound absorption. It can be used for the sound elimination treatment of the wall surface of the experimental pool, the interface of the air medium and the water medium. [0003] In underwater acoustic measurement, the acquisition of many physical parameters needs to be carried out under the condition of free field and far field, and the classical pulse acoustic technology method can meet the above requirements. However, as the frequency of the sound wave decreases, the wavelength increases, and the size of the experimental pool is limited, so that the pulse acoustic technology method is limited by the frequency, and there is a lower limit for the use of low frequencies. The sound-absorbing materi...
Claims
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IPC IPC(8): G10K11/168B32B25/08
Inventor 靳建嘉吴英姿孙铁林孙辉王文芝陈洪娟
Owner HARBIN ENG UNIV