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Balancing method of bone conduction earphone based on distortion product otoacoustic emission

An otoacoustic emission and bone conduction earphone technology, which is applied to earpiece/earphone accessories, sensor parts, sensors, etc., can solve the problems of unreliable measurement of air-bone conduction difference transfer function, etc., and achieve the effect of objective and reliable measurement

Pending Publication Date: 2022-06-07
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an equalization method for bone conduction earphones based on the distortion product otoacoustic emission, which has the advantages of being able to approach the ideal effect, and solves the problem of unreliable measurement of the air-bone conduction difference transfer function. question

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  • Balancing method of bone conduction earphone based on distortion product otoacoustic emission
  • Balancing method of bone conduction earphone based on distortion product otoacoustic emission

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Embodiment 1

[0066] In this embodiment, the timbre of the high-quality air conduction earphone is mainly used as the target timbre, and the otoacoustic emission signal of the distortion product is used to measure the air-bone conduction difference transfer function after the post-processing process, so as to equalize the tested bone conduction earphone. The sound of bone conduction earphones is close to that of air conduction earphones. Specific steps are as follows:

[0067] Step 1: In the audiometry room, the subjects wear bone conduction equipment and air conduction earphones, and a probe-type microphone is installed in the unilateral ear canal of a real person.

[0068] Step 2: The air conduction earphone emits the stimulation sound S1 with frequency f1 and the stimulation sound S2 with frequency f2 at the same time, and obtains the signal V1 through the probe microphone. At this time, V1 includes the stimulation sound artifacts of S1 and S2 and the ear of S2. Acoustic emission signal...

Embodiment 2

[0088] This embodiment mainly takes the timbre of the high-quality speaker as the target timbre, and uses the otoacoustic emission signal of the distortion product to measure the air-bone conduction difference transfer function after the post-processing process, and equalize the tested bone conduction earphone, so that the bone conduction earphone is equalized. The timbre of the air conduction headphones is close to that of the air conduction headphones. Specific steps are as follows:

[0089] Step 1: In the audiometric room, the subjects wore bone conduction equipment, placed a loudspeaker with high-quality sound at a distance of 1m in front, and installed a probe-type microphone in the unilateral ear canal of a real person.

[0090] Step 2: The speaker simultaneously emits the stimulation sound S1 with frequency f1 and the stimulation sound S2 with frequency f2, and obtains the signal V1 through the probe microphone. At this time, V1 includes the stimulation sound artifacts ...

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Abstract

The invention discloses a bone conduction earphone equalization method based on distortion product otoacoustic emission, which comprises the following steps of: measuring distortion product otoacoustic emission, and removing stimulation sound artifacts by using filtering; calculating an air-conducting otoacoustic emission transfer function between the air-conducting stimulation sound and otoacoustic emission and a bone-conducting acoustic emission transfer function between the bone-conducting stimulation sound and otoacoustic emission; calculating to obtain a gas-bone conduction difference transfer function according to the calculated sound emission transfer function of the gas conduction ear and the sound emission transfer function of the bone conduction ear; calculating to obtain an equilibrium function of the bone conduction earphone according to the gas-bone conduction difference transfer function; and carrying out equalization processing on the bone conduction earphone by using the obtained equalization function. According to the bone conduction earphone equalization method based on distortion product otoacoustic emission, an existing bone conduction earphone equalization method is improved, the method is no longer limited to subjective factor adjustment and no longer depends on main observation hearing and long-term debugging, an equalization function is calculated through objective reference quantity and an objective transfer function to equalize the bone conduction earphone, and an ideal effect can be approached.

Description

technical field [0001] The invention relates to the technical field of bone conduction earphone equalization, in particular to a bone conduction earphone equalization method based on distortion product otoacoustic emission. Background technique [0002] Bone conduction sound transmission technology has attracted people's attention in the field of hearing aids and communication and entertainment because of its advantages such as no need to block the ear canal and comfortable wearing. However, there are still major problems in the application of bone conduction sound transmission technology. Compared with air conduction sound transmission technology, bone conduction sound transmission technology is still very immature, not only because of the complex electro-acoustic characteristics of bone conduction headphones and many factors to consider, but also because of the sound transmission characteristics of bone conduction sound in the human skull. There is still no authoritative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/02H04R1/10H04R9/06
CPCH04R9/02H04R1/1091H04R9/06
Inventor 王杰吴昇键桑晋秋郑成诗李晓东
Owner GUANGZHOU UNIVERSITY
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