Device and method for eliminating POP sound generated during power failure of audio equipment

Abstract

The invention relates to a device and method for eliminating POP sound generated during power failure of audio equipment. The audio equipment comprises a power input end, an ASP unit, a power amplification unit and a large capacitor which are connected in sequence, wherein the larger capacitor is connected with the power input end in parallel. According to the device and method for eliminating the POP sound generated during power failure of the audio equipment, the voltage value of the power input end is detected in real time through a detection circuit; whether the power input end is in the power failure process or not is judged through a microprocessor according to the voltage value of the power input end, and a corresponding mute control instruction is output to a mute module according to a judgment result; the mute module conducts a mute action on the audio equipment according to the mute control instruction. When the power input end is in the power failure process, the mute action can be conducted on the audio equipment. Compared with the mode that in the prior art, a mute action is conducted after power failure of a power input end is completed, the device and method for eliminating the POP sound generated during power failure of the audio equipment have better timeliness, are more timely and effectively prevent the POP sound from being generated.

Description

technical field [0001] The invention relates to the application field of electronic technology, in particular to a device and method for eliminating the POP sound of power failure of audio equipment. Background technique [0002] POP sound, also known as DC impact sound, refers to the transient impact caused by various operations when the audio device is powered on and off, and after the power is stable. In the audio system, the POP sound is mainly generated by an analog sound field processing (Analog Sound Processor, ASP) unit and an audio power amplifier unit when power is turned on or off. The impact of the POP sound will impact the human eardrum, affect the comfort of the senses, and even damage the eardrum in severe cases. In addition, the impact of the POP sound will also impact the sound membrane of the speaker, affecting the output sound quality and shortening the life of the speaker. [0003] Such as figure 1 As shown, in the prior art, the elimination of the POP ...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the mute unit performs the mute action after the power-off is completed, and the circuit has a certain delay, so the mute action of the mute unit is often later than the generation time of the POP sound, resulting in an unsatisfactory actual mute effect, and the user poor experience

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