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Function type delay summation method for identifying solid sphere array three-dimensional sound source

A sound source identification, solid sphere technology, applied in instruments, measurement devices, radio wave measurement systems, etc., can solve the problem that the SHB method does not meet the point propagation function and so on

Inactive Publication Date: 2016-07-20
CHONGQING UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the SHB method does not satisfy the premise that the output value of the point spread function is 1 at the sound source position and the output value at the non-sound source position is less than 1, and provides a function for the three-dimensional sound source identification of the solid ball array type delayed summation

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  • Function type delay summation method for identifying solid sphere array three-dimensional sound source
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  • Function type delay summation method for identifying solid sphere array three-dimensional sound source

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[0104] The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0105] Functional delay sum method for 3D sound source identification with solid sphere array:

[0106] 1): Build the measurement system:

[0107] see figure 1 , a solid sphere array in three-dimensional space; the solid sphere array includes a solid sphere with a radius a, and Q microphones distributed on the surface of the solid sphere; these microphones are numbered q, q=1,2 ,..., Q; in the embodiment, Q=36; the center of the solid sphere is used as the origin, and the position coordinates ...

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Abstract

The invention discloses a function type delay summation method for identifying a sold sphere array three-dimensional sound source, wherein a novel FDAS sound source identification method is established. In identifying incoherent sound sources in a three-dimensional space, the function type delay summation method supplies an effective approach for quickly obtaining a clean sound source imaging graph and realizes an important meaning in accurate analysis on a sound source identification result.

Description

technical field [0001] The invention relates to the field of three-dimensional sound source recognition Background technique [0002] SHB is a sound source identification method commonly used by solid sphere arrays. In theory, it constructs the output function as an ideal Dirac delta function based on the orthogonality of spherical harmonics, and only outputs the maximum value at the real sound source position, while other Zeros are output for non-sound source positions. However, in practical applications, factors such as spherical harmonic function order truncation and microphone discrete sampling make this method output a large number of high-level "side lobes" at non-sound source positions in addition to the "main lobe" at the real sound source position. Side lobes can mask weak sound sources so that they cannot be identified, and at the same time they can be mistaken for sound sources, which ultimately leads to serious uncertainty in the analysis results. In order to o...

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 褚志刚杨洋陈涛
Owner CHONGQING UNIV
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