Noise exposure from communications headsets: The effects of environmental noise, attenuation and SNR under the device
Keywords:
Acoustic noise, Correlation methods, Electric currents, Noise pollution, Background noises, Calculation methods, Correlation coefficients, Data sets, Environmental, Environmental noises, Field methods, Industrial sites, Noise exposures, Noise variations, Regression lines, Sound exposures, Sound levelsAbstract
The Canadian studies on headset exposure at various industrial sites and Crabtree are reviewed to gain more insight into the main determinants of headset sound exposure and to provide an empirical basis for the new calculation method under the CSA WG. The field method require two similar communication headset, one worn by the worker to carry out normal tasks and one placed on the manikin to measure sound levels under the device. The correlation coefficient shows that about 95% of the noise variation in headset sound level is explained by the environmental background noise around the user. The slope of regression line is found to be 0.42, which shows that the headset exposure rose by only 0.42 dB for each 1 dB increase in background noise over the data set. The headset equivalent sound levels and the background noise is found to be +12 to +15 dB in the quieter settings and -5 to 0 dB in the noisier settings.
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