Target Strength of Southern Resident Killer Whales ... - BioSonics, Inc

Code:46.2008-final-Feb9
systems (Deng et al., 2010) shows that a signal other than the primary signal at lower frequency could
potentially fall into the hearing range of marine mammals (Southall et al., 2007), which is consistent with
the observation in this case that the killer whales were capable of hearing the 200 kHz sonar because of
transmit signal spectral components at frequencies within the hearing range of killer whales.
Acknowledgment
The work described in this article was funded by The Wind and Water Power Program of the U.S.
Department of Energy Office of Energy Efficiency and Renewable Energy. The study was conducted at
Pacific Northwest National Laboratory (PNNL) in Richland, Washington, which is operated by Battelle
for the U.S. Department of Energy. The authors thank Tim Acker of BioSonics Inc. for providing the
original data. We also thank Charlie Brandt, Andrea Copping, Jayson Martinez, Graysen Squeochs, and
Andrea Currie of PNNL, who provided comments and technical help in preparing the manuscript.
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