A detection method and a device of a loudspeaker

A detection method and speaker technology, applied in electrical components and other directions, can solve the problems of decreased sensitivity, increased hearing threshold, misjudgment, etc., to achieve high accuracy and reduce noise damage.

Inactive Publication Date: 2018-12-18
GOERTEK INC
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Problems solved by technology

On the one hand, this method has high requirements on the inspectors, and the detection efficiency is low; on the other hand, if the inspecto...

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  • A detection method and a device of a loudspeaker
  • A detection method and a device of a loudspeaker
  • A detection method and a device of a loudspeaker

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Embodiment Construction

[0063] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0064] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0065] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0066] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only, and not as limiting. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a detection method and a device of a loudspeaker. The detection method comprises the following steps: collecting sound signals played by the loudspeaker to be tested; Performing discrete short-time Fourier transform on the sound signal to obtain a time-frequency sound signal corresponding to each sampling frequency; Wherein the time-frequency sound signal comprises a signalstrength corresponding to a sampling frequency at each sampling time; Dividing all sampling frequencies according to preset frequency intervals to obtain a plurality of frequency intervals; Calculating a signal strength sum of the sampling frequency in the frequency interval at the corresponding sampling time according to the time-frequency sound signal corresponding to the sampling frequency ineach frequency interval; According to the signal strength, judging whether there is abnormal sound fault in the loudspeaker to be tested. According to the detection method of the present invention, itis possible to quickly and effectively detect whether the loudspeaker has abnormal sound fault or not.

Description

technical field [0001] The present invention relates to the technical field of loudspeaker detection, and more specifically, the present invention relates to a method and device for detecting loudspeakers. Background technique [0002] With the continuous rapid development of science and technology, the performance requirements of speakers are getting higher and higher. Abnormal sound, as a defect of speakers, directly affects the sound quality and user experience of speakers, so it is highly valued by users. At present, the abnormal sound of the speaker is mainly detected by high-order harmonic distortion and artificial listening. [0003] The detection method of high-order harmonic distortion is usually to collect the sound signal played through the speaker, and directly analyze the sound signal by using Fourier transform. Due to the limitations of the Fourier transform, it is impossible to identify small changes in the time domain. Therefore, the accuracy of detecting ab...

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Application Information

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IPC IPC(8): H04R29/00
CPCH04R29/001
Inventor 兰双城吴同海马玉帅
Owner GOERTEK INC
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