Predicting the optimum number, location, and signal sound level of auditory warning devices for manufacturing facilities

Author(s): Yenradee, P.

Journal/Book: Int J Ind Ergonomic. 1999; 24: PO Box 211, 1000 AE Amsterdam, Netherlands. Elsevier Science Bv. 569-578.

Abstract: An analytical method for predicting the optimum number, location, and signal sound level of auditory warning devices is proposed. Factors which influence the perception of alarm signals, namely, ambient sound level, machining workstations (locations and their generated sound levels), workers' locations, and recommended signal sound level reaching workers are considered in the development of the objective function and constraints. Solving the multiple alarm location problem with a nonlinear programming technique yields the minimum number of auditory warning devices, their locations, and the minimum required sound level of warning signals. Two examples are given to demonstrate the applications of the predictive model. Relevance to industry The method presented in this paper enables engineers to determine the optimum number and location of auditory warning devices for manufacturing facilities to ensure adequate perception of warning signals. Since the proposed method is analytical in nature, it helps reduce trial-and-error effort normally spent in locating the alarm devices, thus saving both time and money.

Note: Article Nanthavanij S, Thammasat Univ, Sirindhorn Int Inst Technol, Dept Ind Engn, Patumtanee 12121, THAILAND

Keyword(s): multiple alarm location problem; alarm location predictive model; auditory warning device; effective auditory warning system

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