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A surface microphone calibration device

A technology for calibrating devices and microphones, which is applied in the direction of electrical components, etc., can solve the problems of lack of surface microphones and low calibration accuracy of surface microphones, and achieve the effects of avoiding inner cavity transfer, convenient processing, and reducing calibration cycle and cost

Active Publication Date: 2019-08-02
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Description
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AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of the lack of a special calibration device for surface microphones on the market and the low calibration accuracy of surface microphones, and to invent a calibration device for surface microphones, thereby improving the calibration accuracy of surface microphones and the versatility of the device

Method used

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  • A surface microphone calibration device
  • A surface microphone calibration device
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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] A surface microphone calibration device, the overall structure is as follows figure 1 As shown, the calibration object is a surface microphone 10 of any type, and the reference object is a 1 / 2-inch standard microphone 14 .

[0027] The device body consists of three parts:

[0028] 1. The base part, including: base 1, standard microphone cover 3, standard microphone 14, foot pad 15, which play the role of supporting device;

[0029] 2. The coupling cavity part, including the lower coupling cavity 4, the upper coupling cavity 5, the coupling cavity lining 6, the moving iron sound source 11, and the sealing O-ring 12, is the main body of the device, and its inner cavity is used for calibration;

[0030] 3. The clamping part, including the looper 2, the large-diameter gland 7, the surface microphone cover 8, the connecting bolt 9, and the tension...

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Abstract

The invention discloses a surface microphone calibration device, in particular relates to a calibration device specifically designed for special microphones such as surface microphones, and belongs to the field of calibration of microphones. Aiming at the special nonstandard flat type structure of the surface microphone, the device is designed with a new flat type asymmetrical short coupled cavity structure, a flat large-diameter gland structure, and an independent and simplified surface microphone sleeve cover structure, thus consistency and airtightness of sound fields of receivers of the surface microphone and the standard microphone are ensured, and the universality of the device for different sizes of surface microphones is ensured. Compared with the universal calibration device of the existing conventional microphone, the calibration device is specifically applied to the surface microphone, and can improve the calibration accuracy of the surface microphone, and the universality of the device can be improved.

Description

technical field [0001] The invention relates to a microphone calibration device, in particular to a calibration device specially designed for surface microphones, which belongs to the field of microphone calibration. Background technique [0002] At present, calibration techniques such as coupling cavity reciprocity method or comparison method for conventional microphones have become more and more mature. Since the size of conventional microphones has standard specifications (1, 1 / 2, 1 / 4, 1 / 8 inches, etc.), its calibration The device can be used universally, and the calibration accuracy is guaranteed. [0003] However, the surface microphone is a special type microphone, its shape and structure are relatively special, it is a flat structure, and its front end has no cavity, so it cannot be inserted into the conventional slender coupling cavity and installed symmetrically with the standard microphone. In addition, the small gland used in the conventional elongated cylindrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
CPCH04R29/004
Inventor 付强张炳毅曾吾郑爱建徐佳
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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