Аннотация
OBJECTIVES: It has been shown that low frequency noise (LFN), defined
as broadband noise with dominant content of low frequencies (10-250
Hz), may be annoying to exposed subjects. The aim of the study was
to compare the degree of annoyance caused by LFN with that caused
by broadband noise (BBN) without dominant low frequency components
at similar A-weighted sound pressure levels.
MATERIALS AND METHODS: Subjects included in the study were 145 male
employees of the control rooms. They were exposed to noise through
headphones at gradually increasing dB A-weighted sound pressure levels
within the range of 62-84 dB. Annoyance rating was based on a 100-score
graphical scale.
RESULTS: LFN was rated as significantly more annoying than BBN at
the comparable A-weighted sound pressure levels. The annoyance assessment
of either noise did not depend on age, length of employment or the
level of exposure to noise at a current workplace.
CONCLUSIONS: LFN represents a higher risk of influencing human well-being
than regular BBN and should be considered in the occupational exposure
assessment.
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