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A Calculation Method and Application of External Ear Sound Signal Transfer Function

A technology of transfer function and sound signal, applied in the direction of earpiece/headphone accessories, etc., can solve the problem of not being able to pick up the sound signal of the human eardrum

Active Publication Date: 2018-05-22
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect in the prior art that the acoustic signal received by the human eardrum in the original sound field cannot be truly picked up in the entire audio frequency range, thereby providing a signal that can safely and conveniently obtain a signal close to the real eardrum sound and faithfully reproduce it Methods

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  • A Calculation Method and Application of External Ear Sound Signal Transfer Function
  • A Calculation Method and Application of External Ear Sound Signal Transfer Function
  • A Calculation Method and Application of External Ear Sound Signal Transfer Function

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Embodiment Construction

[0076] The present invention will be further described now in conjunction with accompanying drawing.

[0077] For ease of understanding, the concept of the transfer function involved in the present invention will be described in detail before the method of the present invention is described in detail.

[0078] Such as figure 1 As shown, the sound pressure signal received by the listener's tympanic membrane in the original sound field (the sound pressure signal is denoted as P in this application ed ) is an ideal signal that people have always hoped to obtain. As mentioned in the background art, it is very dangerous and inconvenient to place the microphone on the tympanic membrane of a real person. exist figure 2 In a scene shown, at the ear canal of a listener (which can be a real person or a simulated human head), earplugs or sealing materials are used to seal the opening of the ear canal, and a miniature microphone, such as a microphone, is installed at the opening of the...

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Abstract

The invention relates to a calculation method of the sound signal transfer function of the outer ear, which includes: calculating the reflection coefficient of the outer ear shell of the human body; simulating the external auditory canal of the human body as a combination of multiple sound tubes with a certain length and section function, and calculating the boundaries of each sound tube Calculate the reflection coefficient at the human tympanic membrane; from the reflection coefficient of the outer ear shell of the human body, the reflection coefficient at the boundary of each simulated sound tube, and the reflection coefficient at the human tympanic membrane, the equivalent volume velocity of the listener's ear canal opening is obtained. The transfer function between the volume velocity at the tympanic membrane; according to the impedance of the tympanic membrane and the radiation impedance of the ear shell, and the transfer function between the equivalent volume velocity source of the ear canal opening of the listener and the volume velocity at the tympanic membrane, the sound pressure of the closed ear canal opening is derived The transfer function between the signal and the sound pressure signal received by the listener's eardrum in the acoustic field.

Description

technical field [0001] The invention relates to the field of acoustics, in particular to a calculation method and application of a sound signal transfer function of the outer ear. Background technique [0002] For a long time, recording and replaying the sound pressure signal of the listener's tympanic membrane in the original sound field has always been an ideal method for people to obtain the immersive auditory effect of the original sound field. However, it is extremely dangerous and difficult to directly place the microphone on the human eardrum to record the sound pressure signal. In addition, the shape and size of people's head and ears vary from person to person, and a unified recording and playback system cannot enable different people to obtain signals received by their own unique original sound field tympanic membranes. [0003] Those skilled in the art try to use a standard dummy head to replace the human head and ear canal in order to obtain the recording at the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/10
Inventor 邓惠群杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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