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Examination of recognition of the direction from which an industrial truck auditory danger signal was coming

Młyński R., Kozłowski E.

Measurement Automation Monitoring

2017

Vol. 63, No. 1

6--9

The goal of the study was to assess the manner in which the direction of an industrial truck auditory danger signal is perceived in the presence of noise. A particular element of the study was the reconstruction in the laboratory of actual workplace conditions using acoustic signals recorded in the working environment, taking into account the wearing of hearing protectors. The constructed experimental set-up is described (Fig. 1, Fig. 2). A percentage of correctly determined directions was established, for workplace conditions (Fig. 4) and after reducing the ambient noise (Fig. 5). Recognition of the direction from which the sound is coming is the most difficult when the truck is directly behind the person (20% of correct answers) and in front of the person (up to 30% of correct answers). Correct recognition of the direction is much easier (80–98% of the cases), when the sound originates from the side. Lowering the ambient noise level resulted in better recognition of the direction from which sounds played in the front of the person came.