Dear Colleagues,
We are pleased to announce the following publication in JASA:
Matias, L. and Harris, D. (2015).*A single-station method for the
detection, classification,and location of fin whale calls using
ocean-bottom seismic stations*.J. Acoust. Soc. Am. 138, 504
Abstract:
Passive seismic monitoring in the oceans uses long-term deployments of
Ocean Bottom Seismometers (OBSs). An OBS usually records the three
components of ground motion and pressure, typically at 100 Hz. This
makes the OBS an ideal tool to investigate fin and blue whales that
vocalize at frequencies below 45 Hz. Previous applications of OBS data
to locate whale calls have relied on single channel analyses that
disregard the information that is conveyed by the horizontal seismic
channels. Recently, Harris, Matias, Thomas, Harwood, and Geissler [J.
Acoust. Soc. Am. 134, 3522–3535 (2013)] presented a method that used all
four channels recorded by one OBS to derive the range and azimuth of fin
whale calls. In this work, the detection, classification, and ranging of
calls using this four-channel method were further investigated, focusing
on methods to increase the accuracy of range estimates to direct path
arrivals. Corrections to account for the influences of the sound speed
in the water layer and the velocity structure in the top strata of the
seabed were considered. The single station method discussed here is best
implemented when OBSs have been deployed in deep water on top of seabed
strata with low P-wave velocity. These conditions maximize the ability
to detect and estimate ranges to fin whale calls.
The article can be downloaded from:
http://scitation.aip.org/content/asa/journal/jasa/138/1/10.1121/1.4922706
Alternatively, if you are unable to download the article please email me
for a pdf at: [email protected]
Kind regards,
Luis Matias
------------------------------------
Luis Manuel Matias
Instituto D. Luiz
Campo Grande, Ed. C8, piso 3
1749-016 Lisboa
Portugal
Tel. +351.217500812
Fax. +351.217500119
E-mail. [email protected]
http://idl.ul.pt/
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