Loudspeaker Abnormal Sound Detection Circuit Device and Detection Method Based on Adaptive Filtering

Abstract

The invention discloses a loudspeaker abnormal sound detection circuit device based on adaptive filtering. The device comprises an excitation signal generation module, a response signal acquisition module, an abnormal noise signal enhancement module, a playback module of a loudspeaker and a control module, which are combined together. Ears can more easily recognize the abnormal sound through the loudspeaker, so that the working strength of an auditor can be reduced, the hearing injury is relieved, and the accuracy and the consistency of a test result can be guaranteed, and thus the quality of an electroacoustic product is improved and the comprehensive competitive power of an enterprise is improved. A method for loudspeaker abnormal sound detection adopts a concise and accurate method to judge whether the loudspeaker has the abnormal sound, a response signal received by a microphone is measured, an obtained electric signal is subjected to amplification and filtering processing, an identification algorithm is made or playback is carried out through the loudspeaker and recognition is carried out through the auditor in order to judge whether the loudspeaker has the abnormal sound comprehensively.

Description

technical field [0001] The invention belongs to the technical field of electroacoustic detection, and relates to a circuit device for detecting abnormal sound of a loudspeaker based on adaptive filtering, and also relates to a detection method of the detection circuit device. Background technique [0002] The loudspeaker is a transducer device that converts electrical signals into sound signals. It is the core component of various sound reinforcement equipment, and its performance has a great influence on the playback of sound signals. With the continuous improvement of the level of science and technology, people pay more and more attention to high-quality products, especially the requirements for the sound quality of speakers are also getting higher and higher. In the production process of loudspeakers, abnormal sound detection has become a key link in the quality inspection of electroacoustic devices, which directly determines the quality of products. [0003] Due to vari...

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Problems solved by technology

[0004] At present, domestic loudspeaker manufacturers all use the method of direct listening to the human ear to detect the abnormal sound of the loudspeaker, but because the listener is affected by factors such as technical proficiency, physical and emotional conditions, and work fatigue, the difference in subjective perception of sound quality is relatively large. Large, so it is difficult to use a stable and consistent standard to judge whether there is abnormal sound in the speaker, which makes it difficult to further improve the production efficiency and product quality of the enterprise

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