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Orientation method and device for impulsive sound object

A target and pulse technology, applied in direction finders using ultrasonic/sonic/infrasonic waves, systems for determining direction or offset, etc., can solve problems such as large array aperture, low orientation accuracy, and ballistic sound that cannot be used for stereo orientation

Active Publication Date: 2016-06-15
THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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AI Technical Summary

Problems solved by technology

In the prior art, in order to achieve higher orientation accuracy, the array aperture is larger, and the triangular microphone array needs a flat and wide ground in practical application, and the orientation accuracy is not high on uneven ground such as hillsides, and it cannot be used for ballistic sound. Stereotaxic

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  • Orientation method and device for impulsive sound object
  • Orientation method and device for impulsive sound object
  • Orientation method and device for impulsive sound object

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Embodiment Construction

[0048] Below, the substantive features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed examples.

[0049] Such as Figure 1 to Figure 4 As shown, the directional method of the impulsive acoustic target of the present embodiment comprises the following steps:

[0050] S100) five microphones are provided to form a five-element stereo microphone array of a regular four-sided pyramid, and the sound signal is collected and stored through the five-element stereo microphone array. The present embodiment is a small-sized regular four-sided cone microphone array, such as figure 1 Shown, S 1 , S 2 , S 3 , S 4 and S 5 The five microphones are respectively located on the vertices of the cone, and the design base is (S 1 S 2 S 3 S 4 ) is a square with a side length of 2 meters and a height of 2 meters. figure 1T is the target sound source to be oriented, θ is its pitch angle re...

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Abstract

The invention relates to an orientation method and device for an impulsive sound object. The method comprises the following steps that a five-stereo-microphone array collects and stores sound signals; the signals are de-noised to determine whether the signals are real objective pulse sound signals respectively; a zero-phase low pass filter is used to carry out zero-phase filtering on the signals of different channels; an interpolation method is used to calculate delay inequality and determine whether the delay inequality is correct; meteorological correction is carried out on a delay inequality result; and the direction angle and pitch angle of an object sound source in a coordinate system are calculated, the signal to noise ratio of the impulse sound signal in each channel is calculated, the signal qualities of the channels are determined, and the direction angle and pitch angle of the object relative to the five-stereo-microphone array are obtained after orientated deblurring. Under the condition that requirement for the orientation precision of the system is met, the flexibility and robustness of the system are greatly improved.

Description

technical field [0001] The invention relates to a sound source localization technology, in particular to a method and device for directing an impulsive sound target. Background technique [0002] In the existing sound detection systems at home and abroad, the single sound detection whistle responsible for orientation generally adopts a microphone array arranged in a triangle. The sound source localization based on the microphone array is combined with the strong spatial selectivity of the microphone array and the strong ability to suppress noise. The multi-channel signal is analyzed and processed, and the plane or spatial coordinates of the sound source are located in space, so as to obtain the position of the sound source. In the prior art, in order to achieve higher orientation accuracy, the array aperture is larger, and the triangular microphone array needs a flat and wide ground in practical application, and the orientation accuracy is not high on uneven ground such as h...

Claims

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Application Information

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IPC IPC(8): G01S3/803
CPCG01S3/803
Inventor 黄嵘
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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