[Impact of low-frequencies noise on the ability of thinking and judgment].
Three typical low frequency noise samples which were collected from some associated facilities in urban residential areas and white noise which was produced by acoustic apparatus were selected to compare the competence of brainwork index (AYP) and error rate in noisy environment with those in quiet environment, using dosage exercise method. The result indicates that AYP is lower in noisy environment and the error rate is higher than that in quiet environment, and there are significant differences between them. The changes of most testees in groups that use three different low frequency noise samples respectively are more obvious than the group that uses white noise, and the AYP difference attains significant level. It indicates that low frequency components are the main frequency elements to affect the ability of thinking and judgment. By paired samples t-test and frequency spectrums analysis, the results show that the impact degree of air condition outdoor unit noise is highest, and noise samples which have a peak frequency between 50-300 Hz have a more negative impact on the ability of thinking and judgment than other environmental noise.
Zhu
Yi-ting
YT
Department of Environmental Science, Zhejiang University, Hangzhou 310028, China. zhuyt0701@126.com
Di
Guo-qing
GQ
Gao
Ting-ting
TT
Hong
You-peng
YP
Huang
Yi-fan
YF
Lu
Xiang-ming
XM
Zhang
Bang-jun
BJ
D004777:Environment; D006801:Humans; D007600:Judgment / Q000502:physiology*; D016743:Mental Competency / Q000523:psychology; D009622:Noise; D013850:Thinking / Q000502:physiology*