Citation

Qi Z, Wang H, Zhao X, Wang Q. China Saf. Sci. J. 2021; 31(3): 178-183.

Copyright

(Copyright © 2021, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2021.03.025

PMID

unavailable

Abstract

In order to clarify negative impact of industrial noise on brain cognition, noise of ball mills in a thermal power plant was collected, and 32-channel EEG signals of 10 college students under steady-state industrial noise (90 dB(A)) and quiet state were recorded. Then, Fourier transform Welch method was used to analyze data in frequency domain, and power spectrum of δ band, θ band, α1 band, α2 band and β band was extracted for statistical analysis. The results show that power spectrum is significantly increased in δ and θ frequency bands in noisy environment than silent one. And in frequency band α1, its value in noise state is higher than silent state, but the opposite in band α2. Stimuli of productive noise can cause subjects to distract, and its impact on cognition can be evaluated by power spectrum value or ratio parameter in each band. © 2021 China Safety Science Journal

Language: zh