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Frequency following response signal test system

A signal-response, frequency-following technology, applied in applications, diagnostic recording/measurement, medical science, etc., can solve problems such as high price, and achieve the effect of improving efficiency and high signal-to-noise ratio

Active Publication Date: 2013-03-20
TSINGHUA UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stimulation artifacts and the screening of FFR signals during signal acquisition need to be manually removed, and the price is expensive

Method used

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Such as figure 1 As shown, the present invention includes a computer 1 loaded with a windows system, a D / A acquisition card 2, a multi-channel A / D acquisition card 3, an acoustic sensor 4, a preamplifier 5, an integrated disc electrode 6, A high-impedance input stage 7 , a bioelectric amplifier 8 and a soft earplug (not shown in the figure); the acoustic sensor 4 includes a micro speaker 41 and a micro microphone 42 . In order to isolate the sound in the test subject's ear canal from the external sound, the output end of the micro-speaker 41 and the input end of the micro-microphone 42 are inserted into the same earplug.

[0021] Computer 1 of the present invention connects the input end of D / A acquisition card 2 and the output end of multi-channel A / D acquisition card 3 respectively by corresponding data interface, and D / A acquisition card 2 ...

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Abstract

The invention relates to a frequency following response signal test system. The system is characterized by comprising a computer, a data acquisition (D / A) card, a multichannel A / D acquisition card, a miniature speaker, a miniature microphone, a pre-amplifier, body surface optical disk electrodes, a high input-impedance stage, a bioelectricity amplifier and earplugs. An acoustic meatus sound pressure monitoring module and a frequency following response signal extraction testing module are arranged inside the computer. The acoustic meatus sound pressure monitoring module is used for collecting and recording sound pressure signals inside acoustic meatuses, and off-line analyzing and processing collected sound pressure signals, namely comparing the collected sound pressure signals with the preset judging criteria, and getting rid of signal sections which disagree with acoustic meatus normal sound pressure. A frequency following response signal test platform is used for collecting FFR signals and off-line analyzing and processing collected FFR signals, namely pre-screening and processing the FFR signals which correspond to acoustic meatus normal sound pressure signal segments, and extracting and displaying the FFR signals of a tester are finished. The frequency following response signal test system can be widely applied to the detection of the FFR signals.

Description

technical field [0001] The invention relates to an auditory and electrophysiological testing system, in particular to a frequency-following response signal testing system. Background technique [0002] Frequency Following Response (FFR) is the steady-state response of the brainstem to sound signals recorded on the scalp. , ABR) were recorded in the same way, and the latency was slightly longer than the brainstem auditory evoked potential. It is a concentrated expression of the phase-locked response of brainstem neurons to periodic components in sound, and is closely related to the brain's perception of sound pitch and pitch intensity attributes. [0003] The research and application of FFR can be roughly divided into two aspects, one is the brain's encoding of complex sounds, and the other is the brain's encoding and perception of sound pitch information. Complex sound refers to the sound with the characteristics of the human environment, including harmonic structure, dyna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/12A61B5/04
Inventor 宫琴王瑶孙文生徐钦李晓林
Owner TSINGHUA UNIV
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