Journal is indexed in following databases:



2022 Journal Impact Factor - 0.6
2022 CiteScore - 1.7



HomePage
 




 


 

ISSN 2083-6473
ISSN 2083-6481 (electronic version)
 

 

 

Editor-in-Chief

Associate Editor
Prof. Tomasz Neumann
 

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
www http://www.transnav.eu
e-mail transnav@umg.edu.pl
Estimation on Audibility of Large Cetaceans for Improvement of the Under Water Speaker
1 Tokyo University of Marine Science and Technology, Tokyo, Japan
2 Kawasaki Heavy Industries, Limited, Kobe, Japan
3 RIKEN Brain Science Institute, Wako, Japan
4 Tsurumi University, Yokohama, Japan
ABSTRACT: In order to avoid collisions between the hydrofoil (HF) and cetaceans, the Under Water Speaker (UWS) has been installed on the HF. Because of its potential in utility, we tried to improve the UWS to minimize the risk of the collisions. Under our project, we examined three subprojects; 1) Analyzing the characteristics of the HF underwater noise; 2) Assessing audibility of major large cetaceans by measuring their vocalizations and 3) An anatomical prediction of the audible range by examining the cochlear basal membrane. Through the analyses, it was identified that the noise produced by the HF was a broad-band noise with approximately 150dB re 1?Pa-m.That noise level was lower than those of larger boats suggesting difficulties for cetaceans in sensing approach of the vessels. In addition, analysis of their vocalizations and anatomical obervation indicated that dominant frequency of their audible range was lower than signals produced by the existing UWS.
REFERENCES
Akamatsu, T., Hatakeyama, Y. & Takatsu, N. 1993. Effects of pulse sounds on escape behavior of false killer whales. Nippon Suisan Gakkaishi. 59(8):1297-1303.
Echteler, S.W., Fay, R.R & Popper, A.N. 1994. Structure of the mammalian cochlea. In: A.N. Popper.(eds), Comparative hearing: mammals :134-171.New York. Springer-Verlag. Press.
Francois, R.E. & Garrison, G. R. 1982. Sound absorption based on ocean measurements: Part I: Pure water and magnesium sulfate contributions. Journal of the Acoustical Society of America. 72(3): 896-907.
Green, S & Marler, P. 1979. The analysis of animal communication. In: P. Marler & J.G. Vandenbergh. (eds), Social behavior and communication, vol 3. Handbook of behavioral neurobiology: 73-158. New York. Plenum Press.
Kawamoto, T. 2003. Use of new adhesive film for the preparation of multi-purpose fresh-frozen sections from hard tissues, whole-animals, insects and plants. Arch. Histol. Cytol .66(2):123-143.
Ketten, D.R & Wartzok, D. 1990. Three-dimensional reconstructions of the dolphin ear. In: R. Kastelein.(eds), Sensory abilities of cetaceans. :81-105.New York: Plenum Press.
Ketten, D.R. 2000. Cetacean ears. In: R.R. Fay. (eds), Hearing by whales and dolphins: 43–108.New York. Springer-Verlag Press.
Oleson, E.M., Barlow, J., Gordon, J., Rankin, S., & Hildebrand, J. A. 2003. Low frequency calls of Bryde’s whales. Marine Mammal Sci. 19: 160–172.
Richardson, W.J. 1995. Marine mammal hearing. In:W. Richardson,C.R.Greene, C.I.Malme & D.H. Thomson.(eds), Marine Mammals and Noise.:205-240. California. Academic press.
Shakata, K., Odagawa, A., Yamada, H., Matsunaga, H., & Kato, H. 2008. Toward to avoiding ship strike of cetaceans with the high-speed HF(1)-Identifying expected cetacean species on the track lines of HF. 2008 Annual meeting of M.S.J. summary :135
Citation note:
Yamada H., Kagami L., Yonehara Y., Matsunaga H., Kato H., Terada M., Takahashi R., Okanoya K., Kawamoto T.: Estimation on Audibility of Large Cetaceans for Improvement of the Under Water Speaker. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 6, No. 4, pp. 589-593, 2012

Other publications of authors:

H. Kato, H. Yamada, K. Shakata, A. Odagawa, L. Kagami, Y. Yonehara, M. Terada, K. Sakuma, H. Mori, I. Tanaka, H. Sugioka, M. Kyo
T. Nakashima, N. Kobayashi, H. Yamada, T. Katsumata, R. Yoshida, H. Kato, H. Okabe, I. Kawazu, Y. Yanase, M. Omine, M. Terada, H. Sugioka, M. Kyo

File downloaded 921 times








Important: TransNav.eu cookie usage
The TransNav.eu website uses certain cookies. A cookie is a text-only string of information that the TransNav.EU website transfers to the cookie file of the browser on your computer. Cookies allow the TransNav.eu website to perform properly and remember your browsing history. Cookies also help a website to arrange content to match your preferred interests more quickly. Cookies alone cannot be used to identify you.
Akceptuję pliki cookies z tej strony