Active noise reduction earphone sound source positioning method and device with correction function

Abstract

The invention discloses an active noise reduction earphone sound source positioning method and device with a correction function. The method comprises the following steps of respectively transmittinga test signal by a denoising loudspeaker under an ideal fitting condition and an actual fitting condition, obtaining a receiving signal reflecting an ideal fitting characteristic and an actual fittingcharacteristic by an error sensor, and respectively calculating a first transmission function under the ideal fitting condition and a second transmission function under the actual fitting condition,calculating a correction function by using the second transmission function and the first transmission function, calculating a binaural sound signal cross-correlation function according to the signalreceived by the noise microphone under the actual fitting condition and the correction function, and matching the binaural sound signal cross-correlation function with a pre-stored binaural sound signal cross-correlation function template to obtain azimuth information of the sound source. The actual received signal of the earphone noise microphone is corrected by using the calculation result, so that mismatch between the in-ear microphone and the ear canal fitting state is suppressed, and the sound source positioning performance can be effectively improved.

Description

technical field [0001] The invention relates to the field of sound source localization, in particular to a sound source localization method and device for an active noise reduction earphone with a correction function. Background technique [0002] With the improvement of the development level of modern society, the concept of sports and fitness has been widely recognized. The production and sales of wireless earphones with outdoor calling and listening functions are on the rise rapidly. Different types of wireless earphone products have been launched at home and abroad. In particular, active noise reduction headphones can greatly improve the sense of hearing and obtain a better user experience by using active noise reduction technology to offset environmental noise. Obtaining the orientation information of the environmental noise can enable the active noise canceling earphones to adjust the parameters of the active noise canceling algorithm to improve the noise reduction eff...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned problems, there is a mismatch between the ideal condition where the in-ear microphone and the ear canal of the artificial head fit closely and the actual wearing of the earphone, resulting in an error in the estimation of the sound source direction and reducing the user experience.

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