Browsing by Author "Sevaldsen, Erik"
Now showing items 1-4 of 4
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Bottom reverberation predictions with the acoustic model Lybin - a comparison between three bottom backscattering algorithms
Sevaldsen, Erik (2002)Comparing the three bottom backscattering algorithms we observe variations in the resulting bottom reverberation levels from 0 to more than 20 dB in some cases. Concentrating on the variations at shorter to medium ranges ... -
Effects of naval sonar on seals
Kvadsheim, Petter H.; Sevaldsen, Erik; Scheie, David; Folkow, Lars P.; Blix, Arnoldus S. (2010)There is a growing concern that active military sonars might injure or harm marine mammals. We have therefore done controlled exposure experiments on captive hooded seals to investigate behavioral, physiological and possible ... -
Identification of resonance structures in echo signals from simple cylindrical objects
Sevaldsen, Erik (2001) -
The potential impact of 1-8 kHz active sonar on stocks of juvenile fish during sonar exercises
Sevaldsen, Erik; Kvadsheim, Petter H. (2005)The mortality threshold for juvenile herring exposed to sonar signals is 180-190 dB (re 1μPa), and for other species even higher. This report analyses the potential impact of sonar transmissions on recruitment to important ...