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Noise testing method and system for acoustic products

A test method and product technology, applied in the direction of electrical components, etc., can solve the problems of inability to judge the performance of semi-finished products, the largest amplitude diaphragm ring folds, and product resonance frequency changes, etc., to achieve high test efficiency, simple test methods, and save production cost effect

Active Publication Date: 2020-02-14
SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Acoustic products are "moving" in the working state, and acoustic testing is generally not performed on semi-finished products during the production process, so it is impossible to judge the product performance of semi-finished products in the "moving" state
However, small defects of acoustic products are not easy to be detected in the finished product stage, such as changes in the resonance frequency of the product, changes in the maximum amplitude, or slight wrinkles in the diaphragm ring, etc., which will affect the performance of the acoustic product and affect the experience

Method used

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Embodiment 1

[0064] Please refer to figure 1 , Embodiment 1 of the present invention is: a noise testing method for an acoustic product, which can be used for defect detection of the drive unit before the drive unit of the acoustic product is packaged, and can detect small defects. mainly includes:

[0065] S1. Before the drive unit in the acoustic product is sealed, obtain the voltage value of the drive unit at the maximum amplitude. Specifically: before the drive unit is sealed, the drive unit is tested with a continuous frequency sweep signal, and the amplitude of the drive unit is detected by the laser displacement test method, and the voltage value of the drive unit at the maximum amplitude is obtained, which can be obtained by Klippel to achieve. In this embodiment, the frequency range of the continuous frequency sweep signal is 100-2000 Hz, of course, the frequency range can also be enlarged or reduced, depending on the specific test situation. Preferably, the drive unit is teste...

Embodiment 2

[0073] Please refer to figure 2 , Embodiment 2 of the present invention is: a noise testing system for acoustic products, corresponding to the above-mentioned method, including:

[0074] The acquisition module 1 is used to acquire the voltage value of the drive unit at the maximum amplitude before the drive unit in the acoustic product is sealed; it is specifically used to test the drive unit with a continuous frequency sweep signal, and use laser displacement The test method detects the amplitude of the drive unit, and obtains the voltage value of the drive unit at the maximum amplitude; the frequency range of the continuous frequency sweep signal used by the acquisition module 1 is 100-2000Hz;

[0075] Production module 2, for producing a driving signal according to the voltage value; preferably, for producing a driving signal using a ratio greater than or equal to 70% of the voltage value as the voltage value of the driving circuit; further preferably using the voltage val...

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Abstract

The invention discloses a noise test method and system for an acoustic product. The method comprises the steps of before a drive unit in the acoustic product carries out sealing, obtaining a voltage value when the amplitude of the drive unit is maximum; producing a drive signal according to the voltage value; driving the drive unit through utilization of the drive signal and testing high order harmonic distortion of the drive unit; analyzing a test result of the high order harmonic distortion and obtaining a high order range of the high order harmonic distortion; setting an upper limit value of a total harmonic distortion percentage in the high order range; and testing the high order harmonic distortion of a to-be-tested acoustic product, and when the total harmonic distortion percentage obtained in the high order range is greater than the upper limit value, judging that the to-be-tested acoustic product is an unqualified product. According to the method and the system, a noise test is carried out on a semi-finished product of the acoustic product; whether the semi-finished product has a tiny defect or not can be detected, the reliability and service life of a finished product are improved, moreover, the unqualified product can be timely eliminated, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of noise testing, in particular to a noise testing method and system for acoustic products. Background technique [0002] Acoustic products are "moving" in the working state, and acoustic testing is generally not performed on semi-finished products during the production process, so it is impossible to judge the product performance of semi-finished products in the "moving" state. However, small defects of acoustic products are not easy to be detected in the finished product stage, such as changes in the product resonance frequency, changes in the maximum amplitude, or slight wrinkles in the diaphragm ring, etc., which will affect the performance of the acoustic product and affect the experience. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a noise testing method and system thereof that can detect small defects of acoustic products. [0004] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
CPCH04R29/00
Inventor 郑勇
Owner SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
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