Design of Low-Power Real-Time Acquisition Method for Multi-Channel Audio Sensing Signals
Due to the mixed signal noise interference of multi-channel audio,the acquisition process based on the single wireless sensor networks(WSN)node desalinates the noise characteristics on different routes,and the noise reduction based on a single threshold has the problems of large acquisition deviation and high packet loss rate.A low-power real-time acquisition method for multi-channel audio signals based on WSN nodes is proposed.The five element microphone sound source positioning model is used to determine the orienta-tion,distance,angle and other information of the audio signal sound source.The sensor node is introduced,and the multi-channel noise reduction method of mute area detection is introduced.By adjusting the amplitude value of the mute area to 0,the noise of different lines of the audio signal is reduced.By calculating the appropriate sampling time and average sampling frequency,the low-power acquisition of multi-channel audio signals is realized.In the comparative experimental test,the audio signal value obtained by the proposed method is closest to the actual value,and the highest packet loss rate is only 2.5%,and the highest power consumption is only 0.62 W.The pro-posed method effectively improves the accuracy of the signal.
国家科技期刊平台
NSTL
万方数据
