Automatic test device and method for auditory brainstem response

Abstract

The invention relates to an automatic test device and method for an auditory brainstem response (ABR). On the basis of the calculation of an adaptive averaging method, the average number of records isiteratively increased for the ABR records which are respectively collected under multiple sound intensities, and the signal to noise ratio is increased until ABR signal detection conditions are satisfied, wherein an average curve is obtained according to the ABR records collected in groups and batches, the time lag of the maximum values of cross-correlation functions between the groups is calculated, and it is judged whether or not there are ABR signals having time locking characteristics according to the fact whether or not the deviation of the time lag is within a specified range. The iteration is terminated when the ABR signals are detected or no ABR signals are detected after a maximum iteration number is reached. The minimum sound intensity required to detect the signals is adopted as a hearing threshold value, or the iteration number used under each sound intensity is subjected to function fitting, and the accurate sound intensity corresponding to the hearing threshold value isobtained by means of an interpolation method. According to the automatic test device and method, the efficiency of detecting the threshold value is high, the accuracy rate is approximate to that of manual judgment and is more objective, the repeatability is better, and the repeated collection number of the ABR records can be effectively reduced.

Description

technical field [0001] The invention relates to data processing technology, in particular to an auditory brainstem response automatic test device and method. Background technique [0002] Auditory Brainstem Response (ABR) is an EEG change induced by sound stimulation, and its characteristic waveform occurs within 10 milliseconds after the stimulation, which can be recorded by electrodes placed on the head of a human or animal. The non-invasive feature makes ABR widely used clinically as a means of hearing detection, especially for infants, mentally handicapped people, and intraoperative patients who cannot complete hearing evaluation through verbal communication or body movements. Clinically, the hearing threshold (referring to the minimum sound intensity used to induce the subject's ABR characteristic waveform) has become one of the important indicators for evaluating hearing function. [0003] However, because the signal-to-noise ratio of ABR records varies greatly and th...

AI Technical Summary

Problems solved by technology

This method of subjectively judging the threshold leads to the accuracy of the results depending on personal experience and skills, and increases the dependence on professional manpower, which cannot meet the increasing clinical needs, and has caused great harm to the nationwide hearing screening of infants and young children. great difficulty

This also makes it difficult to realize the automated analysis of ABR test data. In the past 30 to 40 years, people have made a series of efforts in the automation of ABR listening tests and proposed various schemes, but there is no mature and reliable one. Commercialized products come out

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