Journal of Forensic Medicine

法医学杂志 ›› 2020, Vol. 36 ›› Issue (3): 305-310，315.DOI: 10.12116/j.issn.1004-5619.2020.03.003

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Frequency Characteristics of AEPs in Normal Young Adults and Comparison of Their Response Threshold and Pure Tone Audiometry Threshold

CHENG Long-long1,2*, LUO Fang-liang3*, XIONG Yan-he4, JIA Fu-quan5, TANG Peng6, LIU Wei7, ZHANG Biao8, LIU Ji-hui1, WANG Hai-xia2   

  1. 1. School of Forensic Medicine, China Medical University, Shenyang 110122, China; 2. Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, Liaoning Province, China; 3. Institute of Forensic Science, Liaoning University, Shenyang 110036, China; 4. Institute of Forensic Expertise, Shanghai Punan Hospital of Pudong New District, Shanghai 200125, China; 5. Department of Forensic Medicine, School of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot 010059, China; 6. The People’s Liberation Army Judicial Expertise Center, Beijing 100120, China; 7. Hunan Xiangya Judical Identification Center, Changsha 410013, China; 8. Criminal Detachment of Shenyang Public Security Bureau, Shenyang 110013, China
  • Online:2020-06-25 Published:2020-06-28

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Abstract: Objective The tests of three types of auditory evoked potentials （AEPs） were performed on normal young adults, to understand the frequency characteristics of different testing methods and the relationship between response threshold and pure tone audiometry threshold of different methods, and to discuss the forensic value of 3 types of AEPs to evaluate hearing function. Methods Twenty normal young adults were selected, their standard pure tone audiometry threshold, short-term pure tone audiometry threshold and the response threshold of 3 types of AEPs （tone burst-auditory brainstem response, 40 Hz auditory event-related potential and slow vertex response） at 0.5 kHz, 1.0 kHz, 2.0 kHz and 4.0 kHz were recorded. The relationship between the response threshold and standard pure tone audiometry threshold, short-term pure tone audiometry threshold of 3 types of AEPs at different frequencies as well as the differences between different types of AEPs were analyzed. Results The short-term pure tone audiometry threshold was higher than the standard pure tone audiometry threshold at each frequency. The response threshold and standard pure tone audiometry threshold of the 3 types of AEPs all had a certain correlation, and the response threshold of the 3 types of AEPs was higher than short-term pure tone audiometry threshold and standard pure tone audiometry threshold at each frequency. The differences in the differences between the response threshold and standard pure tone audiometry threshold of the 3 types of AEPs at different frequencies had statistical significance. Linear regression mathematical models were established to infer the standard pure tone audiometry threshold （hearing level） from response threshold （sound pressure level） of 3 types of AEPs of normal young adults. Conclusion When using response threshold of different types of AEPs to estimate pure tone audiometry threshold, conversion and correction are needed. Combined use of different types of AEPs could improve the accuracy of hearing function evaluation.

Key words: forensic medicine, evoked potentials, auditory, auditory threshold, audiometry, pure-tone, tone burst auditory brainstem response, 40 Hz auditory event-related potential, slow vertex response