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Sound source positioning device and method based on track moving double microphone arrays

A microphone array and dual microphone technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of ineffective measurement of sound source distance, limited suppression effect, low positioning accuracy, etc., to reduce the number of microphones, real-time performance Good, high-precision results

Active Publication Date: 2015-03-25
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0004] The above method mainly uses a fixed microphone array to locate the sound source, and the number of microphones required is large, and the existing devices and methods mainly locate the angle of the sound source, and the distance of the sound source cannot be measured effectively
In addition, the existing positioning technology has limited suppression effect on environmental noise and reverberation, resulting in low positioning accuracy in high noise and reverberation environments

Method used

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  • Sound source positioning device and method based on track moving double microphone arrays
  • Sound source positioning device and method based on track moving double microphone arrays
  • Sound source positioning device and method based on track moving double microphone arrays

Examples

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Embodiment 1

[0086] to combine figure 1 , the positioning device of this embodiment includes a power supply module, two microphone arrays, a control analysis module, a NI9215A data acquisition card and a host computer, wherein the power supply module supplies power to each microphone, DC motor and photoelectric encoder. The microphone array consists of a fixed microphone and a movable microphone. The fixed microphone is located at the center of the vertical circular track, the movable microphone is located on the circular track, and the circular track is fixed on the base by a bracket. All microphones are MPA201 microphones produced by Beijing Shengwang Shengdian Technology Co., Ltd. The microphones are connected to the data acquisition card through a data cable with a BNC interface, and the data acquisition card transmits to the host computer through a USB cable. There is a DC motor equipped with a photoelectric encoder ZSP3806 at the center of the circular track and at the base. The DC m...

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Abstract

The invention discloses a sound source positioning device and method based on track moving double microphone arrays. The device comprises a power supply module, the two microphone arrays with the same structure, a control analysis module, a data acquisition card and an upper computer. Each microphone array is composed of a fixed microphone and a movable microphone, wherein the relative distance between the fixed microphone and the movable microphone is kept unchangeable. The positioning method comprises the steps that the effective angle information of a sound source target is rapidly determined according to the maximum moving searching time delay value of the microphones, the distance of the sound source target is accurately measured according to a triangle geometrical relationship, and the coordinates of the sound source target can be rapidly obtained through conversion. The sound source positioning device and method can be widely applied to fast and accurate three-dimensional space positioning of the indoor short-distance fixed or slow moving sound source target.

Description

technical field [0001] The invention belongs to the field of sound source localization, in particular to a sound source localization device and method based on track-moving dual-microphone arrays. Background technique [0002] With the continuous development of array signal processing technology, sound source localization technology is becoming more and more mature. The sound source localization technology can make up for the defects of the limited visual positioning angle and the inability to penetrate non-transparent obstacles, and can extract important features in the sound signal. Calculating the direction of the sound source using a microphone array is a passive method for sound source localization, and has been widely used in mobile robot navigation, video conferencing, speech enhancement and recognition, and other fields. [0003] At present, there are two main categories of sound source localization methods using microphone arrays: one is based on the direction of a...

Claims

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 吴祥薄煜明赵高鹏臧鑫杨頔朱震曙何亮章婷婷
Owner NANJING UNIV OF SCI & TECH
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