Examination of recognition of the direction from which an industrial truck auditory danger signal was coming
Treść / Zawartość
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.
Bibliogr. 6 poz., rys.
- Central Institute for Labour Protection – National Research Institute, 16 Czerniakowska St., 00-701 Warszawa, Poland, firstname.lastname@example.org
- Central Institute for Labour Protection – National Research Institute, 16 Czerniakowska St., 00-701 Warszawa, Poland, email@example.com
-  Wilcox S. B.: Why forklifts need signaling the devices. Ergonomics in Design, vol. 2, no. 4, pp. 17–20, 1994.
-  Brammer A. J., Laroche C.: Noise and communication: A three-year update. Noise and Health, vol. 14, no. 61, pp. 281-286, 2012.
-  Sust C. A., Lazarus H.: Signal perception during performance of an activity under the influence of noise. Noise and Health, vol. 6, no. 21, pp. 51-62, 2003.
-  ISO 7731:2003. Ergonomics – Danger signals for public and work areas – Auditory danger signals. Geneva: International Organization for Standardization, 2003.
-  Vaillancourt V., Nélisse H., Laroche C., Giguére C., Boutin J., Laferriére P.: Comparison of sound propagation and perception of three types of backup alarms with regards to worker safety. Noise and Health, vol. 15, no. 67, pp. 420–36, 2013.
-  Alali K. A., Casali J. G.: The challenge of localizing vehicle backup alarms: Effects of passive and electronic hearing protectors, ambient noise level, and backup alarm spectral content. Noise and Health, vol. 13, no. 51, pp. 99–112, 2011.
This paper has been based on the results of a research task carried out within the scope of the third stage of the National Programme "Improvement of safety and working conditions " partly supported in 2014-2016 - within the scope of research and development - by the Ministn of Science and Higher Education-National Centre for Research and Development. The Central Institute for Labour Protection - National Research Institute is the Programme s main coordinator.
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).