Method for improving output audio signal-to-noise ratio of sound amplification system and intelligent sound amplification system

Abstract

The invention discloses a method for improving the output audio signal-to-noise ratio of a sound amplification system, and the method comprises the steps: receiving audio analog signals of a first path and a second path of a sound pick-up, carrying out the high-gain amplification of the audio analog signals of the first path, and carrying out the low-gain amplification of the audio analog signalsof the second path; performing analog / digital conversion to obtain a corresponding first channel audio digital signal and a corresponding second channel audio digital signal; and judging whether the voltage of the first channel audio digital signal is greater than or equal to a preset first voltage threshold, if so, transmitting the second channel audio digital signal as audio output to a sound expander, and otherwise, transmitting the first channel audio digital signal as audio output to the sound expander. The invention also provides an intelligent sound amplification system. According to the invention, the received source audio signal can be gained to obtain the final audio signal with high signal-to-noise ratio, low total harmonic distortion and stable signal strength.

Description

technical field [0001] The invention relates to the technical field of sound reinforcement, in particular to a method for improving the signal-to-noise ratio of an output audio frequency of a sound reinforcement system and an intelligent sound reinforcement system. Background technique [0002] At present, the audio receiver in the sound reinforcement system generally receives the audio analog signal in a monophonic way; then converts the audio analog signal into an audio electrical signal through an analog / digital conversion circuit; The signal is amplified; finally, the amplified audio electrical signal is converted into an amplified audio analog signal through the digital / analog conversion circuit of the loudspeaker for playback. However, after such a sound reinforcement system receives a source audio signal with a relatively large signal power range, it amplifies the relatively low-power audio signal in the source audio signal while also amplifying the relatively high-po...

AI Technical Summary

Problems solved by technology

However, after such a sound reinforcement system receives a source audio signal with a relatively large signal power range, it amplifies the relatively low-power audio signal in the source audio signal while also amplifying the relatively high-power audio signal. The loudspeaker hardware in the sound reinforcement system is easily damaged by the audio signal; moreover, the obtained sound reinforcement audio signal often has a large total harmonic distortion and a relatively low signal-to-noise ratio

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