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A bone conduction earphone and its audio processing method

A technology of bone conduction earphones and bone conduction vibrators, which is applied in the direction of bone conduction transducer hearing equipment, earpiece/earphone accessories, sensors, etc., and can solve the problems of poor bone conduction earphones, sound leakage through bone conduction, and the inability of users to hear the earphones, etc. , achieve the effect of reducing power consumption, preventing sound leakage, and solving the effect of receiving interference

Inactive Publication Date: 2019-04-05
王泽玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, bone conduction technology also has the following disadvantages: (1) The quality of bone conduction sound is related to the position of the contact bone, and also related to the characteristics of human tissue
Therefore, most users based on the existing technology will complain that the "sound quality" and "tone quality" of bone conduction headphones are poor.
(4) The problem of sound leakage through bone conduction
Most of the existing technologies publicize its benefits and ignore its shortcoming, that is, when the user goes to a noisy environment, such as a busy city, a subway, etc., the openness of the bone conduction earphone will cause the user to listen to it at all. No sound from headphones
[0005] Based on the above shortcomings of bone conduction earphones, it can be seen that there is still a lot of room for improvement and development

Method used

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  • A bone conduction earphone and its audio processing method
  • A bone conduction earphone and its audio processing method
  • A bone conduction earphone and its audio processing method

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Embodiment 1

[0047] In the process of using bone conduction headphones, different users have different thicknesses of human tissue, which leads to different problems in the experience of bone conduction headphones, especially the problem of different loudness felt by the auditory nerve. Moreover, it should be noted that human bones and tissues will produce frequency-selective amplitude attenuation and delay to vibration signals. Therefore, it is difficult for high-fidelity or broadband audio signals to reach the auditory nerve through bone conduction. In the case of narrowband audio signals in the prior art, this frequency selective attenuation problem can be solved by providing more audio signal headroom (more power or louder volume) through the sound source, or choosing the best propagation path or skin contact position to solve. However, this method works poorly and causes secondary problems. For example, higher power will increase battery energy loss and affect standby time. At the sa...

Embodiment 2

[0071] In all bone conduction technologies, audio is achieved by transmitting vibration signals through the bone (solid). That is to say, as long as the solid is in contact with the vibration direction, the sound can be transmitted. Therefore, in the design process of bone conduction earphones, because the structure of the fixed bone conduction vibrator is made of solid, it will also transmit vibrations, and even drive the surrounding air to generate secondary vibrations, which will eventually cause sound leakage. Therefore, many existing technologies believe that sound leakage is a problem that is difficult to avoid and solve in bone conduction. Existing technologies have been dedicated to optimizing the generation, control and elimination of bone conduction vibrations. However, all solid vibrations will produce sound. If there is no vibration, there will be no sound transmission, and bone conduction technology cannot be realized. Therefore, the present invention innovates ...

Embodiment 3

[0089]In the prior art, all rear-mounted bone conduction earphone frames need to be tightly attached to human bones and tissues, and form a certain pressure to ensure that the bone conduction vibrator can effectively transmit audio signals through vibration. However, this structure has an obvious defect, that is, the closely fitting earphone frame will form a serious conflict with the spectacle frame of the user wearing glasses. Bone conduction headphones already take up the space where eyeglass frames sit, especially the space needed by the temples. This often results in serious inconvenience to users who wear glasses wanting to wear prior art bone conduction headphones. Either the unreasonable wearing of the bone conduction earphones leads to a poor user experience of the earphones, or the unreasonable wearing of the glasses, which may bring the risk of falling off at the same time for the user, especially when wearing glasses and earphones for sports, neither of which can b...

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Abstract

The invention discloses an audio processing method used in a bone conduction earphone, a bone conduction earphone and an audio playback device based on the bone conduction earphone. The bone conduction earphone includes a human bone and tissue model modeling module and a digital Precorrector, delay estimation unit, digital-to-analog converter, analog-to-digital converter, first low-pass filter, second low-pass filter, audio amplifier, audio driver amplifier, at least one bone conduction microphone, at least one bone conduction Oscillator; real-time detection of the attenuation effect information of human bones and tissues of different users, based on the attenuation effect information, a compensation transfer function is generated, and the digital pre-correction of the input audio signal is performed in the bones and human tissues through the compensation transfer function conduction. Solve the problem that different users have different thicknesses of human tissue, resulting in different experience of bone conduction earphones.

Description

technical field [0001] The invention relates to the technical field of smart wearable devices, in particular to an audio processing method and a bone conduction earphone. Background technique [0002] Bone conduction is a way of sound conduction. Generally, most of the sounds we hear are sound waves transmitted through the air. Air-conducted sound waves pass through the outer middle ear to the cochlea inner ear where they are perceived by the auditory nerve. In addition, sound waves can also be converted into mechanical vibrations of different frequencies, and sound waves are transmitted through the human skull, temporal bone, bony labyrinth, inner ear lymph fluid transmission, cochlea, auditory nerve, and auditory center. This is bone conduction technology. Air-conduction sound waves are transmitted to the inner ear through the outer ear and middle ear; bone conduction is to vibrate the skull or temporal bone, and transmit directly to the inner ear without passing through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10H04R3/00
CPCH04R1/10H04R3/00H04R2460/13H04R1/1091
Inventor 王泽玲
Owner 王泽玲
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