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
CN106954169BActive Publication Date: 2020-02-14SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
Publication Date
2020-02-14

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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.
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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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