Device and method for detecting tightness of speaker module based on quality factor

Abstract

The present invention provides a device and method for detecting the tightness of a speaker module based on a quality factor, wherein the device includes a signal source, a power amplifier, a precision resistor, a voltage test unit and a sealing tool; wherein the power amplifier is used to drive and amplify the signal sent by the signal source ;The precision resistor is connected in series between the power amplifier and the speaker module to be tested, and the speaker module to be tested, the power amplifier and the precision resistor form a series circuit; the voltage test unit is used to detect the voltage at both ends of the precision resistor; the sealing tool is used to seal the to-be-tested The sound outlet of the speaker module. The present invention obtains the speaker impedance and the quality factor according to the airflow resistance generated when the speaker is in operation, thereby detecting the tightness of the speaker module, and can solve the problems of the sound quality being damaged and misjudged when the speaker enters water.

Description

technical field [0001] The present invention relates to the field of acoustic and electric technology, and more specifically, relates to a device and method for detecting the tightness of a speaker module based on a quality factor. Background technique [0002] With the rapid development of electroacoustic technology, the performance requirements of the speaker module are getting higher and higher. As an important factor leading to the distortion of the speaker module, air tightness directly affects the sound quality of the speaker module. Therefore, the speaker module Air tightness testing is one of the important testing items in the speaker module production process. [0003] At present, the main methods for checking the airtightness of the speaker module include the water immersion method and the labial sound test method. [0004] Water immersion method: immerse the speaker module directly in water, and use the speaker module to play sound. If there is air leakage in the...

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Problems solved by technology

[0007] In view of the above problems, the object of the present invention is to provide a device and method for detecting the tightness of the speaker module based on the quality factor, and obtain the impedance and the quality factor of the speaker module according to the airflow resistance generated when the speaker module is working, so as to detect the speaker module. The airtightness of the module is to solve the problem that the sound quality of the speaker module is damaged and misjudged when it enters the water

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