Abstract
The paper consists of study results of exposure to high frequency noise at
metalworking workplaces. The study was carried out using objective methods
(measurements of parameters characterizing the noise) and subjective
studies (questionnaire survey). Metalworking workplaces were located in a
steel structure (e.g. deck gratings) of the manufacturing plant. The
results are equivalent sound pressure levels in the 1/3 octave frequency
bands with center frequencies from 10 kHz to 40 kHz in reference to an
8-hour workday equal to approximately 81-105 dB at most of the tested
workplaces and exceed permissible values. The questionnaire survey of
annoyance high frequency noise (i.e. in the audible frequency and low
ultrasound range) was conducted among 52 operators of machines. Most of
the workers describe the noise as: buzzing, insistent, whistling and
high-pitched squeaky. Respondents specify the noise levels occurring at
workplaces as: loud, impeding communication, highly strenuous and tiring.
Go to article