Estimation on Audibility of Large Cetaceans for Improvement of the Under Water Speaker

• Autorzy: Yamada H. , Kagami L. , Yonehara Y. , Matsunaga H. , Kato H. , Terada M. , Takahashi R. , Okanoya K. , Kawamoto T.
• Języki publikacji: EN

Abstrakty

EN

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 1μPa-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.

Słowa kluczowe

EN

Large Cetaceans; underwater noise; Maine Biology

• Wydawca: Faculty of Navigation, Gdynia Maritime University
• Czasopismo: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
• Rocznik: 2012
• Tom: Vol. 6, no. 4
• Strony: 589--593
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Yamada H.

• Tokyo University of Marine Science and Technology, Tokyo, Japan

autor

Kagami L.

• Tokyo University of Marine Science and Technology, Tokyo, Japan

autor

Yonehara Y.

• Tokyo University of Marine Science and Technology, Tokyo, Japan

autor

Matsunaga H.

• Tokyo University of Marine Science and Technology, Tokyo, Japan

autor

Kato H.

• Tokyo University of Marine Science and Technology, Tokyo, Japan

autor

Terada M.

• KHI JPS Co., Ltd., Kobe, Japan

autor

Takahashi R.

• Kawasaki Heavy Industries Ltd., Kobe, Japan

autor

Okanoya K.

• RIKEN Brain Science Institute, Wako, Japan

autor

Kawamoto T.

• Tsurumi University, Yokohama, Japan

Bibliografia

• [1] 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.
• [2] 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.
• [3] 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.
• [4] 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.
• [5] 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.
• [6] 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.
• [7] Ketten, D.R. 2000. Cetacean ears. In: R.R. Fay. (eds), Hearing by whales and dolphins: 43–108.New York. Springer-Verlag Press.
• [8] 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.
• [9] 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.
• [10] 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