Detection of Blainville’s beaked whales with towed arrays
article
The detection performance of a towed hydrophone array for deep-diving species is quantified by comparing
detections of echolocation clicks from foraging groups of Blainville’s beaked whales (Mesoplodon densirostris)
from the TNO Delphinus array to detections from bottom-mounted hydrophones at the Atlantic
Undersea Test and Evaluation Center (AUTEC) in the Bahamas. A beaked whale group detection probability
of 40% is obtained at close ranges (R < 2000 m) with the Delphinus towed array, and a maximum
detection range of 5000 m is measured. The detection function can be explained by models, when taking
into account the range in rms source levels (200–220 dB re 1 lPa2 m2), and the high system noise levels
during the experiment. The model results suggest that detection ranges up to about 7 km are possible
under favourable conditions, and demonstrate the effectiveness of using towed arrays to monitor
deep-diving species, such as beaked whales
detections of echolocation clicks from foraging groups of Blainville’s beaked whales (Mesoplodon densirostris)
from the TNO Delphinus array to detections from bottom-mounted hydrophones at the Atlantic
Undersea Test and Evaluation Center (AUTEC) in the Bahamas. A beaked whale group detection probability
of 40% is obtained at close ranges (R < 2000 m) with the Delphinus towed array, and a maximum
detection range of 5000 m is measured. The detection function can be explained by models, when taking
into account the range in rms source levels (200–220 dB re 1 lPa2 m2), and the high system noise levels
during the experiment. The model results suggest that detection ranges up to about 7 km are possible
under favourable conditions, and demonstrate the effectiveness of using towed arrays to monitor
deep-diving species, such as beaked whales
TNO Identifier
361717
Source
Applied Acoustics, 71(11), pp. 1027-1035.
Pages
1027-1035
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