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Rotary microphone array device for sound source positioning

A microphone array and sound source localization technology, applied in the field of acoustics, can solve the problem of high demand for the number of microphones and high cost, achieve the effect of accurate positioning and reduce the number of use

Inactive Publication Date: 2018-12-11
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sound source localization device, which can greatly reduce the number of microphones required while ensuring high sound source localization accuracy, and aims to solve the problem of the number of microphones in the high-precision sound source localization of a large number of existing microphones. more costly problems

Method used

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  • Rotary microphone array device for sound source positioning
  • Rotary microphone array device for sound source positioning
  • Rotary microphone array device for sound source positioning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the rotating microphone array device includes a motor, a rotating array bracket and a slip ring lead; the motor is an adjustable-speed motor, which is used to drive the rotating array frame to rotate, and the rotating array frame is fixed on the output shaft of the motor, and the motor can Continuous speed regulation within a certain speed range, after speed regulation, the speed reaches the set speed in a short period of time, and the motor speed is stable.

[0033] The rotating array frame is symmetrically distributed to the center, and the center of the array frame is connected to the motor shaft. The array frame is provided with a chute, the microphone is fixed to the corresponding chuck, and the chuck is connected in the chute, and the rotation radius of the microphone is adjusted by moving the microphone chuck in the chute.

[0034] The slip ring lead is used as a signal transmission device for connecting the rotating microphone cable a...

Embodiment 2

[0039] On the basis of Embodiment 1, the slip ring leads are removed, the signal transmission of the rotating microphone adopts the wireless transmission mode, a wireless transmission module is set on the rotating array frame, and each microphone on the rotating array frame is connected through a signal transmission line The wireless transmission module transmits the signal to the data collector in a wireless manner.

[0040] Regardless of the above-mentioned signal transmission methods, data acquisition triggering is required when sound source localization is performed through this device. Because this solution adopts the uninterrupted output power of the motor to drive the microphone to rotate continuously, therefore, it is very important for the data collection of the microphone during the rotation process to ensure the orientation and angle of each data. The specific trigger process is as follows image 3 Shown:

[0041] The data collector collects signals through manual...

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Abstract

The invention discloses a rotary microphone array device for sound source positioning. The rotary microphone array device comprises a stationary microphone and rotating microphones, and a sound signalcollected by each microphone is transmitted to a data collector. Each of the rotating microphone comprises a rotating array frame, the rotary microphone array device comprises a rotating array frameto which multiple microphones are fixed, the rotating array frame is fixedly connected to a power output shaft of a motor, and the motor drives the rotating array frame to perform a circular motion. Two sides of the rotating array frame are provided with signal triggering devices, and the rotating array frame rotates between the two signal triggering devices. According to the rotary microphone array device, under the condition of ensuring certain sound source positioning precision, a static microphone and a rotating microphone are employed to achieve the real-time accurate positioning of a complex sound field including multiple frequencies, multiple sound sources, a variable frequency and the like, the number of microphones of the rotary microphone array device is greatly reduced comparedwith a conventional sound source positioning device, and the cost of the sound source positioning device can be greatly reduced.

Description

technical field [0001] The invention relates to the field of acoustics, in particular to a rotating microphone array device for sound source localization. Background technique [0002] Since the 1970s, microphone arrays have been applied to sound source localization, and have developed from the initial linear arrays and circular arrays to complex two-dimensional and three-dimensional arrays. Generally, the more the number of microphones, the higher the accuracy of sound source localization. [0003] In engineering applications, the requirements for microphone performance are high. Although a static microphone array composed of a large number of high-performance microphones can better locate the sound source, the corresponding cost is also greatly increased, which is not conducive to the promotion in actual scenarios. [0004] For the general consumer field, with the rapid development of artificial intelligence technology in recent years, sound source localization technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 郑谢王勋年陈正武卢翔宇黄奔王勇田浩王俊伟
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT