A horn detection method and device
A detection device and detection method technology, applied in the direction of electrical components, etc., can solve problems such as affecting the bass effect of the speaker, burning out the speaker, and air tightness of the chamber without the speaker.
Active Publication Date: 2017-05-24
LENOVO (BEIJING) LTD
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Problems solved by technology
Metal composite film speakers have high requirements on the airtightness of the rear chamber. If there is air leakage in the rear chamber, it will not only affect the bass effect of the speaker, but also cause the speaker to burn out.
[0004] However, the detection of the speaker in the prior art is limited to the detection of the circuit connection or the detection of the sound quality under a specific test signal, and there is no special method and device for detecting the airtightness of the rear chamber of the speaker, which causes the speaker to Burned out due to air leak in rear chamber
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[0045] As stated in the background technology, the detection of the speaker in the prior art is limited to the detection of the circuit connection or the detection of the sound quality under a specific test signal, and there is no special method and device for detecting the airtightness of the rear chamber of the speaker. It caused the horn to burn out due to air leakage in the rear chamber during use. Therefore, how to detect the airtightness of the chamber behind the speaker is an urgent problem to be solved at present.
[0046] The inventor found that the airtightness of the rear chamber of the speaker cannot be detected by human ear recognition alone. This is because if the airtightness of the rear chamber of the speaker is not good, there is an air leakage problem, and the air friction sound caused by the air leakage Very small and cannot be heard. Moreover, it is impossible to simply detect the airtightness of the rear chamber of the speaker only through the sound colle...
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The invention discloses a loudspeaker detecting method and device. The loudspeaker detecting method comprises the steps that a working voltage smaller than a sound production threshold value is connected to the input end of a loudspeaker to be detected, so that the loudspeaker to be detected only vibrates and does not produce sounds; a test sound signal in a rear chamber of the loudspeaker to be detected is obtained; the test sound signal is amplified; whether the amplified test sound signal is larger than a preset reference value is judged; it is judged that air leakage occurs on the rear chamber of the loudspeaker to be detected if yes. The loudspeaker detecting method and device can be used for detecting the air tightness of the rear chamber of the loudspeaker.
Description
technical field [0001] The present application relates to the technical field of horn testing, and more specifically, to a horn testing method and device. Background technique [0002] With the continuous development of science and technology, people have higher and higher performance requirements for portable electronic devices with multimedia playback functions. Among them, the audio playback effect of a portable electronic device with a multimedia playback function is an important index to measure the characteristics of its multimedia playback function. [0003] Metal composite film speakers have become the preferred speakers for most portable electronic devices with multimedia playback functions due to their advantages such as good bass effect, high sensitivity, small size, and thin thickness. Metal composite film speakers have high requirements on the airtightness of the rear chamber. If there is air leakage in the rear chamber, it will not only affect the bass effect ...
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IPC IPC(8): H04R29/00
Inventor 林翔
Owner LENOVO (BEIJING) LTD