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Correlation between Mandarin acceptable noise level and cortical auditory evoked potential in young normal-hearing listeners

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2022 Sep;36(9):679-684. doi: 10.13201/j.issn.2096-7993.2022.09.006.


Objective:To investigate the correlation between Mandarin acceptable noise level (M-ANL) and cortical auditory evoked potential (CAEP), and to explore the possible mechanism leading to individual differences in M-ANL values. Methods:Thirty listeners aged 22-33 years with normal hearing were selected as the study subjects, and the M-ANL test and CAEP test were performed respectively. The most comfortable level (MCL), maximum background noise level (BNL), M-ANL and CAEP values of each subject were recorded. The latency of each wave of P1, N1, P2, N2, P300 and the amplitude of P1-N1, P2-N2, P300 in CAEP were recorded for each subject. SPSS 25.0 was used for statistical analysis to explore the correlation between the MCL value, BNL value and M-ANL values and the latency of P1, N1, P2, N2, P300 and P1-N1, P2-N2, P300 amplitudes of CAEP. Results:①The MCL value and M-ANL value were positively correlated with the P2 latency of CAEP, and the correlation coefficients were 0.404 and 0.400, respectively, and the differences were statistically significant (P<0.05). There was no correlation with P1, N1, N2, and P300 latencies of CAEP (P>0.05). ②The MCL value, BNL value and M-ANL value had no significant difference with the CAEP wave amplitudes of P1-N1, P2-N2, and P300 (P>0.05). Conclusion:There was a certain correlation between M-ANL and CAEP in young adults with normal hearing, suggesting that the central auditory cortex might play a potential regulatory role in the background noise tolerance. Individuals with a greater background noise acceptance might have stronger central efferent mechanisms and/or less active central afferent mechanisms.

PMID:36036068 | DOI:10.13201/j.issn.2096-7993.2022.09.006

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