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Bone conduction earphone equalization method based on stimulation frequency otoacoustic emission

An otoacoustic emission, bone conduction earphone technology, applied in frequency response correction, earpiece/earphone accessories, bone conduction transducer hearing equipment, etc., can solve the problem of lack of bone conduction earphone balance and other problems, achieve convenient measurement, objective and reliable measurement Effect

Active Publication Date: 2020-09-15
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the previous related patents or papers have used this method to obtain the air-bone conduction differential transfer function, nor have they carried out bone conduction earphone equalization based on this method.

Method used

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  • Bone conduction earphone equalization method based on stimulation frequency otoacoustic emission
  • Bone conduction earphone equalization method based on stimulation frequency otoacoustic emission
  • Bone conduction earphone equalization method based on stimulation frequency otoacoustic emission

Examples

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Embodiment 1

[0080] like figure 1 As shown, Embodiment 1 provides a bone conduction earphone equalization method based on stimulation frequency otoacoustic emissions. This embodiment mainly takes the timbre of high-quality air-conduction earphones as the target timbre, uses the stimulation frequency otoacoustic emission signal, and measures the air-bone conduction difference transfer function through double-induced technology, and equalizes the bone conduction earphone to make the bone conduction The timbre of the earphones is close to that of air conduction earphones.

[0081] Step 1: In the audiometry room, the subject wears a bone conduction device and an air conduction earphone at the same time, and a probe microphone is installed in one ear canal of a real person;

[0082] Step 2: The air-conduction earphone emits the sweeping detection sound S1, and obtains the signal V1 through the probe microphone. At this time, the signal V1 includes the induced sound artifact of S1 and the otoac...

Embodiment 2

[0104] like figure 1 As shown, embodiment 2 provides a bone conduction earphone equalization method based on stimulating frequency otoacoustic emission. This embodiment mainly takes the timbre of a high-quality speaker as the target timbre, uses the stimulating frequency otoacoustic emission signal, and measures the breath by double-induced technology. - Bone conduction difference transfer function, to equalize the tested bone conduction earphones, so that the timbre of the bone conduction earphones is close to the timbre of high-quality speakers.

[0105] Step 1: In the audiometry room, the subject wears a bone conduction device, places a speaker with high-quality sound in front of him at a distance of 1m, and inserts a probe microphone into one side of the ear canal of a real person;

[0106] Step 2: The loudspeaker emits the sweeping detection sound S1, and obtains the signal V1 through the probe microphone. At this time, the signal V1 includes the induced sound artifact of...

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Abstract

The invention discloses a bone conduction earphone equalization method based on stimulation frequency otoacoustic emission. The method specifically comprises the following steps: measuring a stimulation frequency otoacoustic emission signal, removing an evoked sound artifact by using a double-evoked technology, and respectively calculating an gas conduction otoacoustic emission transfer function between a gas conduction evoked sound and the otoacoustic emission signal and a bone conduction otoacoustic emission transfer function between a bone conduction evoked sound and the otoacoustic emission signal; calculating to obtain a gas-bone conduction difference transfer function according to the gas conduction otoacoustic emission transfer function and the bone conduction otoacoustic emission transfer function; calculating to obtain a bone conduction earphone equalization function according to the gas-bone conduction difference transfer function; and performing equalization processing on abone conduction earphone according to the bone conduction earphone equalization function. Bone conduction earphone equalization does not depend on subjective audiometry and long-term debugging any more, and the effect of the equalized bone conduction earphone can be close to a target as long as an objective reference quantity and an objective transfer function are provided.

Description

technical field [0001] The invention relates to the technical field of bone conduction sound transmission, in particular to a bone conduction earphone equalization method based on stimulation frequency otoacoustic emission, especially an equalization method of bone conduction earphone based on air-bone conduction differential transfer function of stimulation frequency otoacoustic emission. Background technique [0002] Bone conduction technology, due to its advantages of open ear canal without ear blocking effect and comfortable wearing, is not only applied in the field of hearing aids, but also popular in the field of communication / entertainment headphones. However, compared with the mature air conduction sound transmission technology, the sound quality of bone conduction sound playback is far inferior due to the fact that the electroacoustic characteristics of bone conduction earphones and the sound transmission characteristics of bone conduction sound in the human skull ha...

Claims

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Application Information

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IPC IPC(8): H04R1/10H04R3/04
CPCH04R1/10H04R3/04H04R2201/10H04R2430/00H04R2460/13
Inventor 桑晋秋聂亚飞王杰张芳杰郑成诗李晓东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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