Rapid acquisition method for solid sphere sound source identification low-sidelobe ultrahigh-resolution acoustic image

An ultra-high resolution, sound source identification technology, applied in the measurement of ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problem of large deviation of sound source quantization

Active Publication Date: 2016-11-16
CHONGQING UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for fast acquisition of low side lobe and ultra-high resolution acoustic images for solid sphere array three-dimensional sound source identification, and at the same time overcome the shortcomings of the FDAS method for large deviations in sound source quantification

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  • Rapid acquisition method for solid sphere sound source identification low-sidelobe ultrahigh-resolution acoustic image
  • Rapid acquisition method for solid sphere sound source identification low-sidelobe ultrahigh-resolution acoustic image
  • Rapid acquisition method for solid sphere sound source identification low-sidelobe ultrahigh-resolution acoustic image

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[0135] 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 ideas 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.

[0136] Solid sphere sound source identification and low sidelobe ultra-high resolution acoustic image rapid acquisition method:

[0137] 1): Build the measurement system:

[0138] 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; the numbers of these microphones are q, q=1,2 , ..., Q; in the embodiment, Q=36; the center of the solid sphere is used as th...

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Abstract

The invention discloses a rapid acquisition method for a solid sphere sound source identification low-sidelobe ultrahigh-resolution acoustic image. The rapid acquisition method provides an efficient path for rapidly acquiring a clear and clean ultrahigh-resolution sound source imaging image when identifying incoherent sound sources in a three-dimensional space, can quantify sound sources more accurately when compared with a solid sphere function type time delay and summation method, and is of great importance in accurate analysis of a sound source identification result.

Description

technical field [0001] The invention relates to the field of three-dimensional sound source recognition Background technique [0002] With the advantages of good rotational symmetry, comprehensive sound field recording, strong diffraction, and high signal-to-noise ratio of recorded signals, solid spherical microphone arrays are widely used in the field of three-dimensional sound source identification. Spherical Harmonics Beamforming (SHB) is a commonly used acoustic signal post-processing method. However, affected by factors such as spherical harmonic function order truncation and microphone discrete sampling, the sound source imaging image output by this method is polluted by a large number of high-level side lobes, and the spatial resolution is low. These defects will make the analysis of sound source identification results seriously difficult. Uncertainty. At present, the existing deconvolution (DAMAS) method in three-dimensional space establishes a linear equation syst...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 褚志刚杨洋陈涛
Owner CHONGQING UNIV
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