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951 results on '"Au, Whitlow W. L."'

3. Listening for Whales at the Station ALOHA Cabled Observatory

Author

Oswald, Julie N., Ou, Helen, Au, Whitlow W. L., Howe, Bruce M., Duennebier, Fred, Ando, Yoichi, Series editor, Hartmann, William M., Editor-in-chief, Au, Whitlow W. L., Series editor, Baggeroer, Arthur B., Series editor, Fletcher, Neville H., Series editor, Fuller, Christopher, Series editor, Kuperman, William A., Series editor, Miller, Joanne L., Series editor, Tolstoy, Alexandra I., Series editor, and Lammers, Marc O., editor

Published
2016
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4. Studying the Biosonar Activities of Deep Diving Odontocetes in Hawaii and Other Western Pacific Locations

Author

Au, Whitlow W. L., Giorli, Giacomo, Ando, Yoichi, Series editor, Hartmann, William M., Editor-in-chief, Au, Whitlow W. L., Series editor, Baggeroer, Arthur B., Series editor, Fletcher, Neville H., Series editor, Fuller, Christopher, Series editor, Kuperman, William A., Series editor, Miller, Joanne L., Series editor, Tolstoy, Alexandra I., Series editor, and Lammers, Marc O., editor

Published
2016
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5. Introduction: Listening in the Ocean

Author

Au, Whitlow W. L., Lammers, Marc O., Ando, Yoichi, Series editor, Hartmann, William M., Editor-in-chief, Au, Whitlow W. L., Series editor, Baggeroer, Arthur B., Series editor, Fletcher, Neville H., Series editor, Fuller, Christopher, Series editor, Kuperman, William A., Series editor, Miller, Joanne L., Series editor, Tolstoy, Alexandra I., Series editor, and Lammers, Marc O., editor

Published
2016
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10. Acoustic Monitoring of Beluga Whales (Delphinapterus leucas) in Cook Inlet, Alaska

Author

Lammers, Marc O., Small, Robert, Atkinson, Shannon, Castellote, Manuel, Jenniges, Justin, Rosinski, Anne, Moore, Sue, Garner, Chris, Au, Whitlow W. L., Back, Nathan, Series Editor, Cohen, Irun R., Series Editor, Lajtha, Abel, Series Editor, Lambris, John D., Series Editor, Paoletti, Rodolfo, Series Editor, Popper, Arthur N., editor, and Hawkins, Anthony, editor

Published
2012
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11. Soundscape of a Nearshore Coral Reef Near an Urban Center

Author

Au, Whitlow W. L., Richlen, Michael, Lammers, Marc O., Back, Nathan, Series Editor, Cohen, Irun R., Series Editor, Lajtha, Abel, Series Editor, Lambris, John D., Series Editor, Paoletti, Rodolfo, Series Editor, Popper, Arthur N., editor, and Hawkins, Anthony, editor

Published
2012
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35. Human listeners provide insights into echo features used by dolphins (Tursiops truncatus) to discriminate among objects

Author

DeLong, Caroline M., Au, Whitlow W. L., Harley, Heidi E., Roitblat, Herbert L., and Pytka, Lisa

Subjects
Delphinidae -- Physiological aspects, Delphinidae -- Psychological aspects, Dolphins -- Physiological aspects, Dolphins -- Psychological aspects, Echolocation (Physiology) -- Research, Form perception -- Evaluation, Psychology and mental health
Abstract

Echolocating bottlenose dolphins (Tursiops truncatus) discriminate between objects on the basis of the echoes reflected by the objects. However, it is not clear which echo features are important for object discrimination. To gain insight into the salient features, the authors had a dolphin perform a match-to-sample task and then presented human listeners with echoes from the same objects used in the dolphin's task. In 2 experiments, human listeners performed as well or better than the dolphin at discriminating objects, and they reported the salient acoustic cues. The error patterns of the humans and the dolphin were compared to determine which acoustic features were likely to have been used by the dolphin. The results indicate that the dolphin did not appear to use overall echo amplitude, but that it attended to the pattern of changes in the echoes across different object orientations. Human listeners can quickly identify salient combinations of echo features that permit object discrimination, which can be used to generate hypotheses that can be tested using dolphins as subjects. Keywords: echolocation, bottlenose dolphins, human listening, acoustic features, match-to-sample

Published
2007

50. Sound propagation in the near and far-field of a broadband echolocating dolphin and a narrowband echolocating porpoise.

Author

Chong Wei, Au, Whitlow W. L., Ketten, Darlene R., Vishnu, Hari, and Abel Zhong Hao Ho

Subjects
DOLPHINS, ACOUSTIC wave propagation, ECHOLOCATION (Physiology), SIGNAL processing, FINITE element method
Abstract

The echolocation signals emitted by odontocetes can be roughly classified into three broad categories: broadband high-frequency echolocation signals, narrowband high-frequency echolocation signals, and frequency modulated clicks. Previous measurements of broadband echolocation signals propagation in the bottlenose dolphin (Tursiops truncatus) did not find any evidence of focusing as the signals travel from the near to far-field. Finite element analysis (FEA) of high-resolution CT scan data was used to examine signal propagation of broadband echolocation signals of dolphins and narrowband echolocation signals of porpoises. The FEA results were used to simulate the propagation of clicks from phonic lips, traveling through the forehead, and finally transmission into the seawater. Biosonar beam formation in the near-field and far-field including the amplitude contours for the two species was determined. The finite element model was validated by finding the simulated amplitude contour in the horizontal plane was consistent with prior direct measurement results for Tursiops. Furthermore, the simulated far-field transmission beam patterns in both vertical and horizontal planes were also qualitatively consistent with results measured from live animals. This study shows that there is no evidence of convergence for either Tursiops or Phocoena as the sound propagates from near-field to far-field. [ABSTRACT FROM AUTHOR]

Published
2019

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