Abstract：
BACKGROUND:The aim of the study was to answer the question what is the audibility area of auditory danger signal emitted by an industrial truck in the noisy environment. MATERIAL AND METHODS:The sound pressure level of the signal produced by the truck horn was measured in 12 directions around the truck, at a distance of 2 to 10 m. It was analyzed, in which places around the truck, auditory danger signal emitted by this truck can be reliably recognized (according to PN-EN ISO 7731). The analysis included 2 types of masking noise. RESULTS:The calculated audibility area in the presence of one type of the noise is about 2-8 m in front of the truck and up to about 3 m on both sides of the truck. Furthermore, itis audible from the rear of the truck, in the range of about 1.5-10 m and 3-7 m, respectively onthe right and left axes of the truck. In the case of high-frequencynoise, despite of its.higher A-weighted equivalent sound'pressure level (12.5 dB), the audibility area is not significantly different. CONCLUSIONS:The presented method of analysis allowed to determine the audibility area of auditory danger signal in the case of considered industrial truck, at the specific workplace. This method can be used in the future to evaluate any auditory danger signal at the workplace, where noise is present. The caselstudy showed that it is possible to encounter a situation where the use of hearing protection devices at the workplace cannot affect the audibility area. WSTĘP:Celem badań była odpowiedź na pytanie, jaki jest obszar słyszalności dźwiękowego sygnału bezpieczeństwa emitowanego przez wózek jezdniowy w środowisku pracy, w którym obecny jest hałas. MATERIAŁ I METODY:Przeprowadzono badania poziomu ciśnienia akustycznego wytwarzanego przez sygnalizator dźwiękowy wózka jezdniowego, w 12 kierunkach wokół wózka, w odległości od 2 do 10 m. Przeanalizowano, w których miejscach w otoczeniu wózka jezdniowego dźwiękowy sygnał bezpieczeństwa emitowany przez ten wózek, będzie mógł być prawidłowo odebrany (zgodnie z zaleceniami normy PN-EN ISO 7731). W analizie uwzględniono 2 rodzaje hałasu zakłócającego odbiór dźwiękowego sygnału bezpieczeństwa. WYNIKI:Wyznaczony obszar dźwiękowego sygnału bezpieczeństwa w obecności jednego z rodzajów hałasu wynosi od około 2 do 8 m przed wózkiem oraz do około 3 m z obu stron wózka. Ponadto jest on słyszalny z tyłu wózka, w zakresie od około 1,5 do 10 m i od około 3 do 7 m, odpowiednio na prawo i lewo od osi wózka, z wyłączeniem rejonu bezpośrednio za wózkiem. Natomiast, w przypadku hałasu wysokoczęstotliwościowego, pomimo jego wyższego równoważnego poziomu dźwięku A (o 12,5 dB) obszar słyszalności nie różni się istotnie. WNIOSKI:Przedstawiony sposób analizy słyszalności dźwiękowego sygnału bezpieczeństwa pozwolił na wyznaczenie obszarów tej słyszalności w przypadku sygnalizatora analizowanego wózka jezdniowego, w konkretnym środowisku pracy. Może on być w przyszłości zastosowany do oceny dowolnego dźwiękowego sygnału bezpieczeństwa w środowisku pracy, w którym obecny jest hałas otoczenia. Analizowany przypadek pokazał, że możliwe jest występowanie sytuacji, kiedy stosowanie ochronników słuchu w miejscu pracy może nie mieć wpływu na obszar słyszalności dźwiękowego sygnału bezpieczeństwa. Med. Pr. 2015;66(2):173–184.
journal_name
Med Prjournal_title
Medycyna pracyauthors
Młyński R,Kozłowski Edoi
10.13075/mp.5893.00132subject
Has Abstractpub_date
2015-01-01 00:00:00pages
173-84issue
2eissn
0465-5893issn
2353-1339pii
2387journal_volume
66pub_type
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