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

Crosstalk cancellation method and system for bone conduction earphones

A bone conduction earphone and crosstalk cancellation technology, applied in bone conduction transducer hearing equipment, frequency response correction and other directions, can solve the distortion of sound spatial information, affect the wearer's sound source localization ability and spatial hearing sense, binaural isolation low degree problem

Active Publication Date: 2021-09-10
GUANGZHOU UNIVERSITY
View PDF6 Cites 0 Cited by
  • 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 opposite cochlea to form crosstalk
The existence of crosstalk will lead to distortion of the spatial information of the sound, which will seriously affect the wearer's sound source localization ability and spatial hearing

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
  • Crosstalk cancellation method and system for bone conduction earphones
  • Crosstalk cancellation method and system for bone conduction earphones
  • Crosstalk cancellation method and system for bone conduction earphones

Examples

Experimental program
Comparison scheme
Effect test

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. Such as 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 ...

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...

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 relates to a method and system for eliminating crosstalk of a bone conduction earphone. The method includes: acquiring a bone conduction transfer matrix when a user wears a bone conduction earphone; acquiring a stopband frequency range of a shape factor; and obtaining an approximate crosstalk elimination matrix after filtering ; use the approximate crosstalk cancellation matrix to cancel the crosstalk of the binaural signal input to the bone conduction earphone; obtain the sound signal of the crosstalk elimination; play the sound signal of the crosstalk elimination to obtain the sound signal heard by the user's ears; according to the bone conduction The conduction transfer matrix, the approximate crosstalk cancellation matrix and the sound signals heard by the user's binaural ears determine the final crosstalk cancellation matrix; according to the final crosstalk cancellation matrix, the crosstalk cancellation is performed on the binaural signals input to the bone conduction earphone. The present invention adjusts and obtains a suitable crosstalk cancellation matrix according to the bone conduction transfer matrix, the approximate crosstalk cancellation matrix and the sound signal heard by the user's binaural ears, and can obtain the best crosstalk cancellation effect.

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

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
Patent Type & Authority Patents(China)
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