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A Bone Conduction Earphone Equalization Method Based on Skull Impedance Identification

A technology of bone conduction earphone and equalization method, which is applied in the directions of earpiece/earphone accessories, sensor parts, sensors, etc., can solve the problems of unable to listen to the measurement of bone conduction transfer function, difficult to operate, complicated and cumbersome measurement procedures, etc.

Active Publication Date: 2021-04-09
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complicated and cumbersome measurement procedure of the bone conduction transfer function, it is not easy to operate, and it is not possible to quickly and effectively measure the bone conduction transfer function of each listener in a short period of time.

Method used

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  • A Bone Conduction Earphone Equalization Method Based on Skull Impedance Identification
  • A Bone Conduction Earphone Equalization Method Based on Skull Impedance Identification
  • A Bone Conduction Earphone Equalization Method Based on Skull Impedance Identification

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Embodiment 1

[0044] The invention proposes a method for identifying skull impedance through a bone conduction earphone, and establishes a database by measuring the physiological characteristics of the skull, the bone conduction transfer function and the skull impedance for a plurality of subjects. For the listener who only needs to measure the skull impedance and skull physiological characteristics, match the subject whose skull impedance and skull physiological characteristics are closest to the database, and propose the subject's bone conduction transfer function as the listener's bone conduction transfer function, Then perform equalization processing to achieve the listener's personalized bone conduction equalization.

[0045] The bone conduction earphone equalization method based on impedance recognition proposed by the present invention specifically includes:

[0046] Step 1) measuring the bone conduction transfer function of N subjects;

[0047] Step 2) using bone conduction earphon...

Embodiment 2

[0077] The bone conduction transfer function of this embodiment adopts an indirect measurement method to obtain the air-bone conduction difference transfer function. Other steps are with embodiment 1.

[0078] Measurement of air-bone conduction differential transfer function:

[0079] The method for measuring the air-bone conduction difference transfer function in the present invention includes measuring the air-bone conduction difference transfer function based on the air and bone sound cancellation method, and measuring the air-bone conduction difference transfer function based on the hearing threshold method. Air and bone sound cancellation means that the mixed sound volume is minimized by adjusting the amplitude difference and phase difference of the air and bone conduction excitations with the same frequency, that is, the air and bone conduction sounds are canceled at the cochlea. The invention mainly introduces the measurement of air-bone conduction difference transfer ...

Embodiment 3

[0091] The bone conduction transfer function of this embodiment adopts a direct measurement method, using otoacoustic emission signals to measure the bone conduction transfer function. Other steps are with embodiment 1.

[0092] Specific implementation plan for measuring bone conduction transfer function using otoacoustic emission signals:

[0093] Otoacoustic emissions are weak sound energy that is actively released from the cochlea and picked up by a highly sensitive microphone placed in the ear canal. Stimulus frequency otoacoustic emission (Smiluate Frequency Otoacoustic Emissions, SFOAE) refers to an OAE in which the audio energy of the stimulating sound energy is emitted back to the ear canal when the cochlea is stimulated by continuous pure tones. Using the measurement method of SFOAE, the bone conduction transfer function from the sound source to the ipsilateral cochlea can be obtained by deconvoluting the SFOAE signal with the stimulus signal. The device is connecte...

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Abstract

The invention discloses a bone conduction earphone equalization method based on skull impedance identification, the method comprising: measuring the subject's skull impedance; measuring the subject's skull physiological characteristics; based on the skull impedance and skull physiological characteristics in a pre-established Matching is performed in the database to obtain a personalized bone conduction transfer function that matches the subject's skull impedance and physiological characteristics of the skull; based on the personalized bone conduction transfer function, a corresponding personalized bone conduction headphone equalizer is designed.

Description

technical field [0001] The invention belongs to the field of bone conduction earphone equalization, and in particular relates to a bone conduction earphone equalization method based on skull impedance identification, which can design a personalized bone conduction equalizer only through skull impedance identification and individual skull physiological characteristics under the condition of establishing a database. Background technique [0002] As bone conduction equipment enters the field of consumer electronics from the field of medical hearing aids, bone conduction earphones have gradually become an important sound reproduction device. When using bone conduction earphones for sound playback, due to factors such as the frequency response characteristics of the bone conduction earphone itself, the coupling between the bone conduction earphone and the skin, and the vibration characteristics of the skull, the sound reproduction effect of the bone conduction earphone is not good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10H04R9/02H04R9/06
CPCH04R1/1091H04R9/02H04R9/06
Inventor 聂亚飞桑晋秋张芳杰郑成诗李晓东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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