Sound-intensity-difference-effect-based real-time sound source orientation method
A sound source and effect technology, which is applied to direction finders using ultrasonic/sonic/infrasonic waves, systems for determining direction or offset, etc., can solve problems such as complex algorithm implementation, increased system overhead, and increased system overhead. The effect of small system overhead and simple operation of the method
Active Publication Date: 2016-09-21
广州高新兴机器人有限公司
View PDF4 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there are some inherent shortcomings in the method based on time delay estimation: most of the methods for estimating time delay use the cross-correlation method and its various improved methods, and the accuracy of the cross-correlation method is affected by the sampling rate of the signal, and the higher the sampling rate , the higher the accuracy of time delay estimation, which has special requirements on the signal sampling rate, which increases the overhead of the system
Moreover, the implementation of the algorithm is complicated, and a large number of mathematical models such as Fourier transform, cross-correlation method, least square method, covariance, etc. need to be used in the process of signal processing and noise processing, which also increases the system overhead; in addition, the traditional positioning method is also easy. Affected by reverberation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0048] The principle adopted by the present invention is as figure 1 As shown, a plane Cartesian coordinate system is constructed with a cross matrix, the ac direction is the X axis of the coordinate system, the ac distance is 30cm, the db direction is the Y axis of the coordinate system, and the db distance is also 30cm. When a sudden sound signal is transmitted to the cross array from a certain direction, the four pickups will detect the sound signal successively. Take the instantaneous sound intensity when the four pickups just detect the sound, subtract the sound intensity of a from the sound intensity of c to get the vector sound intensity V1 in the X-axis direction, and subtract the sound intensity of b from the sound intensity of d to get the Y-axis The vector sound intensity V2 in the direction. Pairwise subtraction of the pickups cancels out the effects of ambient noise. Using V1 and V2, the direction of the sudden sound in the coordinate system can be obtained, the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a sound-intensity-difference-effect-based real-time sound source orientation method. A four-element cross pick-up unit is used for carrying out sound source direction detection; and a smoothing algorithm is employed during a processing and orientation process of a detected sound source signal. With the method, a sound direction can be determined in real time according to a sudden sound signal; and the influence on sound source direction determination by the system by an echo can be avoided. And the system costs are low.
Description
technical field [0001] The invention belongs to the technical field of sound source orientation, and in particular relates to a real-time sound source orientation method based on the sound intensity difference effect. Background technique [0002] Most of the current research and applications are mostly based on time delay estimation positioning methods. This method is completed in two steps. The first step is to process the signals received by each microphone to estimate the time delay; the second step is to calculate the spatial orientation of the sound source based on the spatial structure of the microphone and the time delay estimated in the first step. . However, there are some inherent shortcomings in the method based on time delay estimation: most of the methods for estimating time delay use the cross-correlation method and its various improved methods, and the accuracy of the cross-correlation method is affected by the sampling rate of the signal, and the higher the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/802
CPCG01S3/802
Inventor 覃学松黄洪加俞翔刘玉姣黄仝宇宋一兵汪刚柏林刘双广
Owner 广州高新兴机器人有限公司