Low-cost low-power sound source orientation method

Abstract

The invention relates to a low-cost low-power sound source orientation method. A hardware system of the sound source orientation method comprises a single-chip microcomputer, multiple microphones, multiple operational amplifiers and one communication interface chip, wherein the microphones are connected with the AD interface of the single-chip microcomputer respectively through the operational amplifiers, and the single-chip microcomputer is connected with a computer through the communication interface chip. The sound source orientation method comprises the following specific steps: step one, consistency screening is performed on the multiple microphones; step two, four microphones subjected to the screening in the first step are selected and are arranged in the form of a cross array, the microphones on diagonal lines of the cross array are paired, and a sound source is oriented by use of a sound source orientation method of an arrival time difference; and step three, a calculation result is output to a communication port. The sound source orientation calculation method brought forward by the invention is simple and highly efficient, has quite low requirements for an operation capability and resources of a processor and can meet the requirement for realizing sound source orientation at a low cost.

Description

technical field [0001] The invention belongs to the field of acoustic signal processing, and in particular relates to a sound source orientation method with low cost and low power consumption. The method utilizes a low-cost hardware platform to realize a sound source orientation algorithm with high precision and reliability. Background technique [0002] The so-called sound source orientation refers to forming an array through multiple microphones, collecting sound signals, using signal processing technology to analyze and process the data, and finally obtaining the angle between the sound source and the reference direction of the array. [0003] Microphone array directional technology is widely used. For example, video conference system, abnormal sound source location in public places, robot location, bank security monitoring, sound-based tracking camera system, hearing aid sound source location, mechanical fault detection, noise source location, etc. [0004] With the con...

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Problems solved by technology

[0005] In order to solve the existing technical problems, the purpose of the present invention is to provide a sound source orientation method with low cost and low power consumption, which solves the technical problems of high hardware cost, high power consumption and low measurement accuracy of the traditional sound source orientation method

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