Mobile phone and audio processing circuit thereof

Abstract

The invention discloses an audio processing circuit. The audio processing circuit comprises a low-pass filter, a phase inverter, a bass speaker, a balance speaker and a first sound chamber, wherein the low-pass filter is used for carrying out low-pass filtering processing on audio signals so as to generate bass playing signals, the phase inverter is used for carrying out phase inversion processing on the bass playing signals so as to generate bass phase-inverted playing signals, the bass speaker is used for playing the bass playing signals, the balance speaker is used for playing the bass phase-inverted playing signals, and the bass speaker and the balance speaker are oppositely arranged in the first sound chamber. By using the manner, the bass speaker and the balance speaker can be oppositely arranged in the first sound chamber according to the audio processing circuit; as the bass speaker and the balance speaker are oppositely arranged in the first sound chamber and simultaneously play the playing signals which are in inverted phases relative to each other, the bass speaker can do fully-free piston motion according to the sizes of the signals, and the bass performance is optimized.

Description

technical field [0001] The invention relates to the communication field, in particular to a mobile phone and an audio processing circuit thereof. Background technique [0002] With the development of mobile terminals, more and more functions are concentrated on the mobile terminal. Among them, sound playback is one of the very important functions. However, the sound playback on mobile terminals today mainly adopts monaural playback, which cannot meet people's growing requirements for high-quality listening enjoyment. [0003] The prior art provides a stereo surround sound effect enhancement circuit. By designing a two-stage filter circuit, the first-stage high-pass filter filters out low-frequency interference, and the second-stage filter circuit filters the difference signals of the left and right channels, and then respectively Superimposed on the main signal of the left and right channels after the primary filter for output, so as to achieve a stereo effect. [0004] H...

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Problems solved by technology

[0004] However, when all the low-frequency components of the audio signal are output through the speaker in this method, the air pressure in the sound cavity is relatively large due to the relatively large amplitude of the speaker, and the vibration of the speaker is suppressed, resulting in poor bass performance and affecting the user experience.

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