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A loudspeaker and noise technology, which is applied in the field of loudspeaker noise detection methods and devices, can solve the problems of detecting smart devices and ensuring low cost, and achieve the effect of improving accuracy
Active Publication Date: 2014-12-24
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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[0007] The embodiment of the present invention provides a loudspeaker noise detection method, which aims to solve the problem t...
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Embodiment 1
[0037] figure 1 A flow chart of a loudspeaker noise detection method provided by the first embodiment of the present invention is shown. In this embodiment, the noise detection of the speaker of the smart device is directly performed through the hardware of the smart device itself, and the details are as follows:
[0038] Step S11, playing the detection signal.
[0039] Wherein, the detection signal is pink noise or frequency sweep signal.
[0040] In this step, an application processor (Application Processor, AP) of the smart device is used to play the detection signal.
[0041] Step S12, extracting the frequency at which the detection signal passes through the audio codec.
[0042] In this step, the AP performs real-time Fourier calculation on the played detection signal, and extracts the frequency of the detection signal currently sent to the audio codec (Codec).
[0043] Step S13, when the extracted frequency is within a preset frequency range, record the extracted freq...
Embodiment 2
[0077] Figure 4 A structural diagram of a loudspeaker noise detection device provided by the second embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown.
[0078] The noise detection device of described loudspeaker comprises:
[0079] The detection signal playing unit 41 is configured to play the detection signal.
[0080] Wherein, the detection signal is pink noise or frequency sweep signal.
[0081] The frequency extraction unit 42 is configured to extract the frequency of the detection signal passing through the audio codec.
[0082] Specifically, the frequency obtained by performing real-time Fourier calculation on the played detection signal is extracted.
[0083] The frequency and impedance value recording unit 43 is configured to record the extracted frequency and the impedance value of the speaker corresponding to the detection signal when the extracted frequency is...
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Abstract
The invention is applicable to the field of audio detection and provides a noise detecting method and device of a loudspeaker. The noise detecting method includes steps of playing detecting signals; extracting frequency of the detecting signals passing Codec; recording the extracted frequency and impedance of the loudspeaker corresponding to the detecting signals when the extracted frequency is within a preset frequency range; determining the maximum value of the recorded impedance; looking up symmetric points utilizing the maximum value of the impedance as the center; judging whether electric signals of the loudspeaker satisfy requirements or not according to the maximum value of the impedance, the frequency corresponding to the maximum value of the impedance and the frequency corresponding to the symmetric points utilizing the maximum value of the impedance as the center; when the electric signals of the loudspeaker do not satisfy the requirements, judging that the loudspeaker has noise; when the electric signals of the loudspeaker satisfy the requirements, judging whether acoustic signals of the loudspeaker meet the requirements or not so as to judge whether the loudspeaker has noise or not. By the noise detecting method and device in the embodiment, accuracy in detecting results is improved.
Description
technical field [0001] The invention belongs to the field of audio detection, and in particular relates to a noise detection method and device for a loudspeaker. Background technique [0002] During the production process of smart devices (such as mobile phones, tablet computers, etc.), pure tone detection will be performed to find out the smart devices with noisy speakers. [0003] At present, the methods of noise detection include: (1), the smart device plays the frequency sweep signal, and the human ear listens to it. When there is noise in the speaker of the smart device, the smart device is played, and the failure analysis is carried out; (2), the smart device plays the frequency sweep signal or other signals, and the acoustic signal sent by the speaker of the smart device is analyzed by an electroacoustic instrument Analysis, when the analysis result is lower than the set threshold, it is determined that the smart device is not a good product, and the smart device wil...
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