Unlock instant, AI-driven research and patent intelligence for your innovation.

Distributed microphone array based acoustic source localization system with low complexity

A microphone array, low-complexity technology, applied in positioning, radio wave measurement system, character and pattern recognition, etc., can solve low-complexity problems, achieve strong adaptability, high accuracy, reduce complexity and calculation load Effect

Active Publication Date: 2017-09-26
DALIAN UNIV OF TECH
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is a low-complexity distributed microphone array sound source localization system. Each microphone node in the microphone array is composed of at least 2 microphones, including:

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Distributed microphone array based acoustic source localization system with low complexity
  • Distributed microphone array based acoustic source localization system with low complexity
  • Distributed microphone array based acoustic source localization system with low complexity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0116] In this embodiment, MATLAB is used for simulation, and the floor plan of the simulated conference room is as follows figure 2 As shown, the size of the room is 8×6×3 meters; the size of the conference table is 5×2×0.8 meters; the height of the speaker is set to 1.6 meters; the interval between the position markers is 1 meter, and there are 24 marker positions in total; Each microphone node contains two microphones with a fixed distance of 30 cm, and a total of 15 pairs of microphones are scattered on the conference table. The Image model is used to simulate the room impulse response and the audio signal received by each microphone, and the sound speed is 343 m / s.

[0117] In this embodiment, a "mark judgment error" is defined to measure the accuracy of the algorithm, which is defined as the difference between the distance from the position to be located to the obtained mark position and the theoretical position distance, as follows image 3 shown.

[0118] In the sim...

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

No PUM Login to View More

Abstract

The invention discloses a distributed microphone array based acoustic source localization system with low complexity. Each microphone node in a microphone array at least comprises two microphones. The distributed microphone array based acoustic source localization system is characterized by comprising an offline training unit and a feature library localizing unit, wherein the offline training unit comprises a time delay estimation module I and a time delay distribution function estimation module; the feature library localizing unit comprises a time delay estimation module II, a reliability value solution module, a distributed data fusion module (203) and a localization module (204); the time delay estimation module II obtains the reliability value m corresponding to each of n time delay tau at each to-be-localized position through calculation; for a to-be-localized acoustic source point, n microphone nodes in the system correspond to n reliability values m1, m2,... and mn; the distributed data fusion module (203) obtains the total reliability value Bel of the system by fusing the reliability values corresponding to all the microphone nodes in the system with a weighted DS theory; the localization module (204) obtains a fingerprint position point with the reliability value closest to the reliability values of P fingerprint points by comparing the reliability values of the selected to-be-localized positions, and the fingerprint position point is the acoustic source location.

Description

technical field [0001] The invention relates to a low-complexity distributed microphone array sound source localization system. Mainly related to patent classification number G01 measurement; test G01S radio orientation; radio navigation; using radio waves for distance measurement or speed measurement; using radio wave reflection or re-radiation for positioning or presence detection; Locating by the cooperation of one or more directions or lines of position; positioning by determining the cooperation of two or more distances G01S5 / 18 Using ultrasonic, sonic or infrasonic waves G01S5 / 20 Determining by multiple spaced orientators The location of the signal source. Background technique [0002] In applications such as service robots, it is often necessary to locate sound sources. Compared with the microphone array using the traditional regular structure, the distributed microphone array not only has better flexibility, but also has a larger spatial aperture, which can achieve...

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
no application Login to View More
IPC IPC(8): G01S5/22G06K9/62
CPCG01S5/22G06F18/257G06F18/25
Inventor 陈喆殷福亮崔智语
Owner DALIAN UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com