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Composite cavity sound baffle

A technology of acoustic baffles and cavities, which is applied in the direction of sound-emitting devices and instruments, can solve the problems affecting the performance of the vector broadside array sonar system, the effective working frequency band of the vector sensor is narrow, and the range of reflection gain is large. Signal reception, simple structure, and simple manufacturing process

Pending Publication Date: 2019-09-10
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

In order to solve this problem, a cavity baffle welded into an air cavity by metal sheets is used as the anti-acoustic baffle. The closed air cavity and the water impedance are seriously mismatched, which plays a good role in decoupling and anti-acoustic, but in the rectangular cavity Under the cavity baffle condition, the reflection gain of the vector sensor varies widely, and the effective operating frequency band of the vector sensor is narrow, which affects the performance of the vector broadside array sonar system

Method used

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  • Composite cavity sound baffle
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Embodiment Construction

[0024] The following examples describe the present invention in more detail.

[0025] Combine figure 1 with figure 2 , A composite rectangular cavity baffle applied to a vector side array sonar system includes a sealing layer 1, a rubber cavity layer 2 and a cavity baffle 3 welded into an air cavity by a thin metal plate. The rubber The cavity layer is embedded with circular truncated cavities 4 arranged periodically, and the vector sensor is disposed at a certain distance above the sealing layer during application. Both the sealing layer and the rubber cavity layer are made of ethylene propylene rubber, and the cavity baffle plate welded into the air cavity by metal thin plates is made of steel material. The distance between the axes of all truncated cone cavities on the selected rubber cavity layer is 10mm, the height of the truncated cone cavity is 16mm, the diameter of the top surface of the truncated cone is 4.2mm, the diameter of the bottom surface of the truncated cone is...

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Abstract

The invention provides a composite cavity sound baffle. The composite sound baffle comprises a cavity baffle, the cavity baffle is bonded with a rubber layer, and cavities arranged periodically are formed in the rubber layer. According to the composite cavity sound baffle, the rectangular cavity baffle is covered with the thin rubber layer material structure with the cavities, thus in the frequency band range of 550Hz-3000Hz, the composite sound baffle has the great sound insulation property, the effective working frequency band of a vector sensor under the composite sound baffle is full-frequency band, signals are advantageously received, and the performance of a vector flank array sonar system is improved. The composite cavity sound baffle has the characteristics that the structure is simple, and the manufacturing technology is simple.

Description

Technical field [0001] The present invention relates to an acoustic baffle, in particular to a composite acoustic baffle for improving the receiving performance of a vector sensor under the acoustic baffle. Background technique [0002] In the 1990s, my country successfully developed a vector sensor, which broke through the limitation of relying on sound pressure sensors in my country's ocean detection system and promoted the development of my country's sonar technology. The vector sensor can obtain the sound pressure and particle vibration velocity information in the underwater sound field at the same time. Through the joint processing of the underwater medium particle vibration velocity and sound pressure signal, it can well suppress the isotropic background noise. When using the vector sensor When composed of a sonar array, it can obtain better performance than the same number of sound pressure arrays; at the same time, the directivity of the vibration velocity channel of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162G10K11/168
CPCG10K11/162G10K11/168
Inventor 杨德森陈红月朱中锐胡博
Owner HARBIN ENG UNIV
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