Portable all-purpose otoacoustic emission detecting system

An otoacoustic emission and detection system technology, applied in the field of medical devices, can solve the problems of high price, unfavorable replacement and portability, and inability to give quantitative index diagnosis results.

Active Publication Date: 2012-07-25
TSINGHUA UNIV
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Problems solved by technology

[0003] At present, the comprehensive full-featured otoacoustic emission detection system commercially used is imported from abroad, which is relatively expensive, with a unit price of about 150,000 yuan, and most of them use dedicated A / D acquisition cards, which are not conducive to replacement and portability; The hand-held screening otoacoustic emission detection system can only give simple qualitative results, but cannot give comprehensive quantitative indicators and further diagnostic results

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  • Portable all-purpose otoacoustic emission detecting system

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Embodiment Construction

[0040] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0041] Such as figure 1 : This portable otoacoustic emission detection system is mainly composed of five main parts: an acoustic sensor, a USB sound card, a preprocessing circuit, a power supply circuit and a computer.

[0042] The system uses a USB multimedia sound card to replace the function of the digital acquisition card to realize the A / D and D / A conversion of the signal. The signal after D / A conversion is output through the Speaker Out port of the sound card, and the stimulus sound signal is sent to the speaker, and then transmitted to the external auditory canal of the human ear; the sound signal collected in the external auditory canal is input through the Line in port of the sound card to complete the A / D conversion function, sent to the notebook computer.

[0043]The function of the acoustic sensor is to realize the energy conv...

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Abstract

The invention relates to a portable all-purpose otoacoustic emission detecting system which belongs to the field of otoacoustic emission signal detectors and is characterized by comprising a portable PC (Personal Computer), a USB (Universal Serial Bus) sound card, a miniature loudspeaker, a miniature radio, a preprocessing circuit and a power supply, wherein the miniature loudspeaker comprises two sounders which can respectively send out stimulating sounds capable of evoking a transient evoked otoacoustic emission signal and a distortion product otoacoustic emission signal, the portable PC isprovided with a USB sound card sensitivity calibration module and a miniature loudspeaker sensitivity calibration module, the PC, the USB sound card and the miniature loudspeaker form a stimulating sound playing path, and the miniature radio, the preprocessing circuit, the USB sound card and the PC form an otoacoustic emission signal acquisition path. The invention realizes the integrated detection for the transient otoacoustic emission signal and the distortion product otoacoustic emission signal and simultaneously realizes the portability of the all-purpose otoacoustic emission signal detecting system.

Description

Technical field: [0001] The invention is a portable full-function otoacoustic emission detection system, in particular to a portable otoacoustic emission detection system based on a USB multimedia sound card, which belongs to the technical field of medical equipment. Background technique: [0002] Otoacoustic Emissions (OAE) refers to a kind of weak audio energy produced in the cochlea of ​​the inner ear, which is transmitted to the external auditory canal through the ossicular chain and tympanic membrane, and is part of the normal function of the human ear. This phenomenon was first discovered by British scholar David Kemp in 1978 and applied clinically [2] . The discovery of otoacoustic emission has confirmed that the cochlea, as a peripheral auditory receptor, can not only passively convert external acoustic signals into bioelectrical signals and transmit them to the center to cause hearing, but also has an active energy release process, thus establishing that the cochle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/12H04R29/00
Inventor 宫琴叶大田金慧君胡艳茹
Owner TSINGHUA UNIV
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