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Crosstalk elimination method and system of bone conduction earphone

A bone conduction earphone, crosstalk cancellation technology, applied in bone conduction transducer hearing equipment, frequency response correction and other directions, can solve the problems of crosstalk interference, low binaural isolation, sound spatial information distortion, etc. The effect of the crosstalk cancellation effect

Active Publication Date: 2020-11-20
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when wearing bone conduction earphones, there will be serious crosstalk interference due to the low isolation of the two ears, that is, the vibration of any bone conduction earphone will be transmitted to the o

Method used

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  • Crosstalk elimination method and system of bone conduction earphone
  • Crosstalk elimination method and system of bone conduction earphone
  • Crosstalk elimination method and system of bone conduction earphone

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0057] figure 1 It is a flowchart of a crosstalk cancellation method for a bone conduction earphone provided by an embodiment of the present invention. like figure 1 As shown, the methods include:

[0058]Step 101: Obtain the bone conduction transfer matrix when the user wears the bone conduction earphone. In this embodiment, it is specifically: use the bone conduction frequency sweep tone to induce the stimulation frequency otoacoustic emission signal, and calculate the bone conduction between the bone conduction earphone and the user's bilateral inner ears according to the frequency sweep stimulation signal and the stimulation frequency otoacoustic emission signal A transfer function, obtaining a bone conduction transfer matrix according to the bone conduction transfer function.

[0059] Step 102: Obtain the stopband frequency range of the shape factor according to the frequency range where the singular values ​​of the personalized bone conduction transfer function on bot...

Embodiment 2

[0066] Select a subject (24 years old) with normal hearing and no history of external ear or middle ear disease, firstly use bone conduction sweep tones to induce stimulation frequency otoacoustic emission signals, and then extract pure frequency sweep stimulation frequency otoacoustic emission signals , the bone conduction impulse response signal is obtained by cross-correlating with the frequency-sweeping stimulation signal, and then the bone conduction transfer function between the bone conduction earphone and the subject's bilateral inner ears can be estimated through Fourier transform. Obtain the corresponding bone conduction transfer matrix. Subjects sit in a soundproof room for listening experiments, and the equipment is connected as figure 2 shown.

[0067] First, according to the frequency range in which the singular values ​​of the personalized BCTF (bone conduction transfer function) on both sides of the subject appear, the stopband frequency range of the shape fa...

Embodiment 3

[0089] Figure 8 A structural block diagram of a crosstalk cancellation system for a bone conduction earphone provided by an embodiment of the present invention, as shown in Figure 8 As shown, the system includes:

[0090] The transfer matrix acquiring module 201 is configured to acquire the bone conduction transfer matrix when the user wears the bone conduction earphone.

[0091]In this embodiment, the transfer matrix acquisition module 201 includes: a transmitting signal unit, configured to induce a stimulation frequency otoacoustic emission signal by using bone conduction frequency sweep tone; a bone conduction transfer function calculation unit, configured to The bone conduction transfer function between the bone conduction earphone and the user's bilateral inner ears is obtained from the stimulation frequency otoacoustic emission signal; the bone conduction transfer matrix acquisition unit is configured to obtain a bone conduction transfer matrix according to the bone c...

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Abstract

The invention relates to a crosstalk elimination method and system of a bone conduction earphone. The method comprises the following steps: acquiring a bone conduction transfer matrix when a user wears the bone conduction earphone; acquiring a stop-band frequency range of a form factor; obtaining a filtered approximate crosstalk elimination matrix; performing crosstalk elimination on binaural signals input into the bone conduction earphone by using the approximate crosstalk elimination matrix; obtaining a crosstalk-eliminated sound signal; playing the crosstalk-eliminated sound signal to obtain a sound signal heard by both ears of the user; determining a final crosstalk elimination matrix according to the bone conduction transfer matrix, the approximate crosstalk elimination matrix and thesound signal heard by the two ears of the user; and performing crosstalk elimination on the binaural signals input into the bone conduction earphone according to the final crosstalk elimination matrix. According to the bone conduction transfer matrix, the approximate crosstalk elimination matrix and the sound signal heard by the two ears of the user, the appropriate crosstalk elimination matrix is obtained through adjustment, and the optimal crosstalk elimination effect can be obtained.

Description

technical field [0001] The invention relates to the technical field of crosstalk cancellation, in particular to a crosstalk cancellation method and system for bone conduction earphones. Background technique [0002] Under normal circumstances, sound waves are transmitted to the inner ear through air conduction and bone conduction, and then vibrated by the inner and outer lymph fluid of the inner ear. After a comprehensive analysis of the cortex, the sound is finally "heard". [0003] According to the different sound wave transmission paths, it can be divided into air conduction earphones and bone conduction earphones. When wearing air conduction headphones, the binaural sound signals played by them can easily ensure the separation of the left and right channel signals, and there is almost no crosstalk problem. However, when wearing bone conduction earphones, there will be serious cross-talk interference due to the low isolation of the two ears, that is, the vibration of th...

Claims

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Application Information

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IPC IPC(8): H04R3/04
CPCH04R3/04H04R2460/13
Inventor 王杰陈运达杨乔赫陆锡坤桑晋秋郑成诗李晓东
Owner GUANGZHOU UNIVERSITY