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Microphone linear array for sound scattering coefficient site test

A field test and microphone technology, applied in the field of microphone line array, can solve the problems of high shape requirements, time-consuming and laborious processing and cutting, and long test cycle, and achieve the effect of simple measurement, reduced measurement cost, and low acoustic environment requirements.

Active Publication Date: 2016-11-16
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a line array of microphones for on-site testing of the acoustic scattering coefficient, which mainly solves the technical problems of the existing acoustic scattering coefficient measurement, such as high requirements on the shape of the test piece material, time-consuming processing and cutting, and long testing period.

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  • Microphone linear array for sound scattering coefficient site test
  • Microphone linear array for sound scattering coefficient site test
  • Microphone linear array for sound scattering coefficient site test

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Embodiment Construction

[0012] refer to figure 2 , 3 , 4, a microphone line array for on-site testing of sound scattering coefficients, comprising a U-shaped fixed bracket 3, one end of the U-shaped fixed bracket is installed with a rotatable triangular bracket 4, and the other end of the U-shaped fixed bracket is installed with an angle adjustment disc 5, a triangular bracket Both the bracket and the angle adjustment disc are equipped with a connecting bracket 6, and the microphone mounting plate 7 is fixed on the connecting bracket. 8 interference fit. The entire microphone line array is composed of 13 microphones arranged in a straight line with unequal distances, and the spacing between the microphones is 10 cm, 5 cm, 5 cm, 5 cm, 2.5 cm, 2.5 cm, 2.5 cm, 2.5 cm, 5 cm, 5 cm , 5 cm, 10 cm. The angle adjustment disk 5 is engraved with scales, and each scale is spaced at 10 degrees.

[0013] During the measurement, the directivity diagram of the linear array composed of 5 microphones (the distanc...

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Abstract

The invention relates to a microphone linear array and especially relates to the microphone linear array for sound scattering coefficient site test. The invention aims to solve the technical problems that the current sound scattering coefficient measurement has high requirement for material shape of test piece, the processing cutting is time-wasting and labor-wasting and the test period is long. According to the technical scheme provided by the invention, the microphone linear array for sound scattering coefficient site test comprises a U-shaped fixing bracket, wherein a rotatable triangular bracket is mounted at one end of the U-shaped fixing bracket; an angle adjusting disc is mounted at the other end of the U-shaped fixing bracket; connecting brackets are arranged on both triangular bracket and angle adjusting disc; a microphone mounting plate is fixed on the connecting brackets; a hole is formed on the microphone mounting plate; a microphone is fixedly mounted on the microphone mounting plate through a rubber sleeve. The microphone linear array for sound scattering coefficient site test can be applied to the site detection for irregular sound scattering coefficient of the sound diffuser in the field of architectural acoustics and also can be applied to the site test for the irregular sound scattering coefficient.

Description

technical field [0001] The invention relates to a microphone line array, in particular to a microphone line array for on-site testing of sound scattering coefficients. It can be used for on-site detection of the random incident sound scattering coefficient of the sound diffuser in the field of architectural acoustics, and can also be used for the on-site test of the random incident sound scattering coefficient. Background technique [0002] Acoustic scattering coefficient measurement is an emerging acoustic testing item in recent years, which is mainly used to evaluate the acoustic scattering characteristics of indoor interfaces. The existing standard test method is reverberation chamber measurement, figure 1 It is a schematic diagram of testing the acoustic scattering coefficient of an equal-sized model. The specific method is to cut the test piece into a square or a circle (with an area of ​​about 10 square meters), and place the test piece 1 on the rotating round table 2...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/023G01N2291/106
Inventor 钱中昌邓峥安兆亮周子炜陈继红陈文王
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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