Pulse sound signal detection method and device
A detection method and acoustic signal technology, which is applied in the field of acoustic signal detection, can solve the problem of increasing the detection false alarm rate of acoustic detection equipment, affecting the integrity of extracted pulse acoustic signals, affecting the detection probability and detection accuracy of acoustic detection equipment for pulse sound, etc. problems to achieve the effect of improving probability and accuracy
Active Publication Date: 2016-10-26
THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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Problems solved by technology
When the acoustic detection equipment is placed next to a strong noise source such as a diesel engine, the received signal will be submerged in the background noise. In windy weather, the wind noise will increase the detection false alarm rate of the acoustic detection equipment. These harsh conditions will seriously affect The detection probability and detection accuracy of the sound detection equipment for the impulsive sound, and further affect the integrity of the extracted impulsive sound signal
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[0095] Based on the first embodiment of the impulsive sound detection method, the method also includes:
[0096] Step 106, when the preset condition is met, determine the detected impulsive sound signal of each channel as the target impulsive sound signal.
[0097] Among them, the steps of determining that the preset conditions are met include:
[0098] 1061. Determine whether the correlation coefficient of the pulse sound signals of any two channels in the detected pulse sound signals of each channel is greater than the first preset threshold, if not, determine that the preset condition is not satisfied; if so, determine the Whether the pulse sound signal length is greater than the second preset threshold, if not, then determine that the preset condition is not met; if so, determine whether the signal-to-noise ratio of the pulse sound signal of each channel is greater than the third preset threshold, if not, then determine If the preset condition is not met, if yes, it is de...
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An embodiment of the invention discloses a pulse sound signal detection method, which is used for increasing accuracy of pulse sound signal detection. The pulse sound signal detection method comprises the steps of: sampling pulse sound signals in channels of a microphone array to obtain sampled sound signals of the channels; judging whether intensive background noise exists in the sampled sound signals, if so, performing noise reduction processing on the sampled sound signals and then calculating frame energy of the sampled sound signals after noise reduction processing, if not, directly calculating frame energy of the sampled sound signals; and detecting pulse sound signals of the channels according to the frame energy of the sampled sound signals and existence state of the sampled sound signals. The embodiment of the invention further discloses a pulse sound signal detection device, which is used for increasing accuracy of pulse sound signal detection.
Description
technical field [0001] The invention relates to the technical field of acoustic signal detection, in particular to a method and device for detecting pulsed acoustic signals. Background technique [0002] When detecting, directing, and locating impulsive sounds such as artillery, gunshots, and explosions, it is necessary to reliably detect and extract the impulsive sound signal first. [0003] At present, the methods commonly used in the detection of pulse sound include power spectrum detection method, energy detection method, statistical detection method, constant false alarm rate detection method and so on. The power spectrum detection method performs short-time Fourier transform on the signal, calculates the power spectrum of each segment of the signal, and compares the power spectrum of the frequency band of interest with the power spectrum of the entire segment of the signal. When the ratio is greater than a certain threshold, it is considered that there is a target App...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 王志峰李志宇江丽杨博黄嵘张思凡蔡明万众张皓罗晓松
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP