Evaluating the consequences of the new standards on noise conditions in ships

Document Type : Original Research Paper

Authors

1 Department of Energy, University of A Coruña, Paseo de Ronda 51, 15011, A Coruña, Spain

2 Department of Geography, University of Golestan, Gorgan, Iran

Abstract

Noise is one of the main parameters to be considered to achieve a healthy indoor ambience in ferries. Therefore, the noise standards need to be more specialized and specifically based on real sampled data and case studies. In the present research, the noise levels in a ship, under different working conditions, were sampled and compared with those specified in the new and old standards. An initial study showed two main noise sources- clients and main engine- that influence other indoor environments, reducing the quality of life on board. The real-time data revealed that the maximum noise level limits set by the International Maritime Organization (IMO) in the older Resolution A.468 (XII) was mostly respected, except in areas where maintenance of the noise level was difficult, owing to the continuous influx of people, especially at the time of boarding and disembarking of the passengers and at the food self-service areas. In this sense, under the new Resolution MSC.337 (91), the maximum noise level allowed in the accommodation has been reduced by 5 dB (A), but this environment does not meet the standard. More results show that future standards must not only consider the noise level in a working place and add another variable, such as, the number of working hours, to obtain a representative equivalent energy, and they must also consider that a simple modification of this standard implies a redesign of most of the indoor ambiences onboard.

Keywords


Abrahamsen, K. (2012). The ship as an underwater noise source. Proceedings of Meetings on Acoustics. Volume 17, 11th European Conference on Underwater Acoustics, ECUA 2012; Edinburgh; United Kingdom; 2 July
Badino, A., Borelli, D., Gaggero, T., Rizzuto, E., and Schenone, C. (2012). Normative framework for ship noise: Present situation and future trends. Noise Control Engineering Journal, 60(6), 740-762.
Enda, M. and Eoin, A.K. (2014). An assessment of residential exposure to environmental noise at a shipping port. Environ. Int., 63, 207-215.
Gaggero, T. and Rizzuto, E. (2013). Noise on board RO-pax vessels: Measured levels on existing ships and new pre-normative requirements. Paper presented at the Analysis and Design of Marine Structures - Proceedings of the 4th International Conference on Marine Structures, MARSTRUCT 2013, 45-52. Goujard, B., Sakout, A. and Valeau, V. (2005). Acoustic comfort on board ships: An evaluation based on a questionnaire. Appl. Acousti., 3,1063-1073. Grundevik, P., Lundh, M. and Wagner, E. (2009). Engine control room - human factors. Paper presented at the RINA, Royal Institution of Naval Architects International Conference - Human Factors in Ship Design, Safety and Operation- Papers, 61-67. Wysocki, L.V., Dittami, J.P. and Ladich, F. (2006). Ship noise and cortisol secretion in European freshwater fishes. Biol. conserv., 128(2), 501 –508. Lois, P., Wang, J., Wall, A. and Ruxton, T. (2004). Formal safety assessment of cruise ships. Tourism Manage., 25 (6), 93–109. Lundh, M., Lützhöft, M., Rydstedt, L. and Dahlman, J. (2011). Working conditions in the engine department – A qualitative study among engine room personnel on board Swedish merchant ships. Appl. Ergonomics., 42 (2), 384–390. Lesage, V.C., Barette, C., Kingsley, M.C.S. and Sjare, B. (1999). The effect of vessel noise on the vocal behavior of belugas in the St.Lawrence river estuary, Canada. Mar. Mammal. Sci., 15, 65–84.
Lugli, M. and Fine, M.L. (2003). Acoustic communication in two freshwater gobies: ambient noise and short-range propagation in shallow streams. J. Acoust. Soc. Am., 114(3), 512–521.
Megan, F., Ross, R., Wiggins, M. and Hildebrand, J.A. (2012). Underwater radiated noise from modern commercial ships. J. Acoust. Soc. Am., 131 (1), 92-103.
Matveev, K.I. (2005). Effect of drag-reducing air lubrication on underwater noise radiation from ship hulls. J. Vib. Acoust., 127(4), 420–422.
McDonald, M. A., Hildebrand, J. A., Wiggins, S. M. and Ross, D. (2008). A 50 year comparison of ambient ocean noise near San Clemente Island:A bathymetrically complex coastal region off Southern California. J.Acoust. Soc. Am., 124, 1985–1992.
Orosa, J. and Oliviera, A. (2010). Assessment of work-related risk criteria onboard a ship as an aid to designing its onboard environment. Journal of Marine Science and Technology, 15, 16-22. Spreng, M. (2000). Possible health effects of noise induced cortisol increase. Noise and Health, 7, 59–63. Tamura, Y., Kawada, T. and Sasazawa, Y. (1997). Effect of ship noise on sleep. J. Sound. Vibration., 205 (4), 417-425. Tamura, Y., Horiyasu, T. and Sano, Y. (2002). Habituation of sleep to a ship‟s noise as determined by actigraphy and a sleep questionnaire. J. Sound. Vibration, 250 (1), 107-113. Vasconcellos, J.M. and Latorre, R.G. (2001). Recreational boat noise level evaluation. Ocean. Eng., 28(3), 1309–1324.
Wysocki, L.E. and Ladich, F. (2005). Effects of noise exposure on click detection and the temporal resolution ability of the goldfish auditory system. Hearing Res., 201(2), 27–36.