A method and device for detecting resonance of a speaker

Abstract

The present invention discloses a method and device for detection of sound resonance. The method comprises: controlling the sounding frequency of a sound horn to change in a certain frequency range, and determining the fixed frequency of the horn when abnormal sound is generated; controlling the sounding frequency of the horn to be the fixed frequency, and employing a laser mode to detect the frequency value of each structure part in the sound; and when detecting that the frequency value of a certain structure part is the same as the fixed frequency, determining the structure part as a resonance source generating abnormal sound. The method can completely record the resonance frequency of the structure parts in a non-contact mode, and the measurement result is accurate; the positions generating the resonance abnormal sound can be accurately determined so as to fundamentally solve the problem of the resonance abnormal sound, improve the product competitiveness; and moreover, the method can be generally applied to the research and development phase of a sound such as a high-power horn device and the like.

Description

technical field [0001] The invention relates to the field of sound boxes, in particular to a method and device for detecting resonance of sound boxes. Background technique [0002] All objects have a natural frequency. When the external vibration frequency reaches the natural frequency of the object, the object will resonate and produce abnormal noise. The reason for the abnormal sound is that when the object resonates, due to the hard contact between the object and the object (such as surface-to-surface contact) without cushioning, it is very easy to cause vibration and impact in a small range to produce abnormal sound. Nowadays, speakers and other multimedia playback devices have become more and more necessary household equipment for people's lives, providing people with a comfortable feeling in their leisure time. Speakers are mostly equipped with tweeters and woofers with higher power. The frequency coverage of commonly used woofers is 50Hz-600Hz, the bracket or structu...

AI Technical Summary

Problems solved by technology

Nowadays, speakers and other multimedia playback devices have become more and more necessary household equipment for people's lives, providing people with a comfortable feeling in their leisure time. Speakers are mostly equipped with tweeters and woofers with higher power. The frequency coverage of commonly used woofers is 50Hz-600Hz, the bracket or structure that fixes the woofer is very easy to resonate and produce abnormal noise, which affects the sound quality of the speaker

[0003] The problem of speaker resonance has become the most difficult problem for structural engineers to solve in the stage of speaker research and development. Usually, when encountering the problem of abnormal resonance and noise, they can only blindly paste foam to buffer it. It is impossible to find the place where resonance occurs in a short time, so it can only be carried out blindly. Keep testing until you find the resonance point

Moreover, when using a traditional contact-type vibration measuring instrument to detect the resonance of a speaker, when its probe touches the resonance source, an external force will be applied to the resonance source, which will change the physical characteristics of the resonance source and change the vibration frequency of the resonance source at that time. The resonance frequency recorded at this time is also inaccurate.

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