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Sound power test stand

A test frame and sound power technology, which is applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of high manufacturing cost, large sound field influence, small bearing capacity, etc., and achieve simple structure, improved accuracy, The effect of strong bearing capacity

Active Publication Date: 2017-08-01
上海声望声学科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a sound power test stand to solve the technical problems in the prior art that the sound power test stand has a great influence on the sound field, small bearing capacity, poor stability, and high manufacturing cost.

Method used

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Embodiment Construction

[0015] See figure 1 , which is a schematic structural diagram of a sound power test stand in the prior art.

[0016] Such as figure 1 As shown, the sound power test frame 100 includes a plurality of arc-shaped support guide rails 110, and one end of the plurality of arc-shaped support guide rails 110 is connected together, and the whole is in a partial spherical shape. When using the sound power test stand 100 for testing, the sound power test stand 100 is placed on the ground of the semi-anechoic chamber, and the sound power test device such as a microphone is fixed on the partially spherical curved support rail 110 for testing.

[0017] When the existing sound power test stand tests a sound source with a larger size, its own size will also be enlarged accordingly, and then the sound power test stand 100 will be deformed as a whole due to its own weight and the weight of the test device. , which in turn causes the offset of the positioning point of the test device, thereby ...

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Abstract

The invention discloses an acoustical power testing frame which comprises a plane net-shaped frame and a testing device positioning frame, wherein the testing device positioning frame is movably connected to the plane net-shaped frame to fixedly install a testing device. The acoustical power testing frame is strong in bearing capacity, stability of layout erection of acoustical power testing test points is improved, a deformation phenomenon cannot occur in the acoustical power testing process, positions of the test points cannot deviate, test positioning is accurate and stable, the acoustical power testing frame is simple in structure and convenient to install, influences on an acoustics environment are small, and accuracy of acoustical power testing is further improved.

Description

technical field [0001] The invention relates to the technical field of acoustic testing, and in particular to a sound power testing frame. Background technique [0002] The sound power test is widely used in various fields such as automobiles, aerospace, household appliances, computers and communications, industrial products, etc., to perform noise tests and acoustic characteristics tests on products. A relatively common sound power test method is the free field method, that is, the sound source is placed in a semi-free field (semi-anechoic chamber), and the test is performed on a hemispherical surface centered on the sound source or other test surfaces with certain symmetry. The sound pressure level of several uniformly distributed points on the surface, and then obtain the sound power level. [0003] At present, most of the sound power test stands are composed of arc-shaped bracket guide rails. However, the use of existing sound power test stands for sound power testing h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
Inventor 罗伟
Owner 上海声望声学科技股份有限公司