title: The effect of sound speed profile on shallow water shipping sound maps.
abstract: Sound mapping over large areas can be computationally expensive because of the large number of sources and large source-receiver separations involved. In order to facilitate computation, a simplifying assumption sometimes made is to neglect the sound speed gradient in shallow water. The accuracy of this assumption is investigated for ship generated sound in the Dutch North Sea, for realistic ship and wind distributions. Sound maps are generated for zero, negative and positive gradients for selected frequency bands (56 Hz to 3.6 kHz). The effect of sound speed profile for the decidecade centred at 125 Hz is less than 1.7 dB.
authors.affiliation: Behavioural Biology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlandsosertlek@gmail.com.
authors.forename: Hüseyin Özkan
authors.initials: HÖ
authors.lastname: Sertlek
authors.affiliation: Netherlands Organisation for Applied Scientific Research (TNO), Acoustic and Sonar Group, P.O. Box 96864, 2509 JG, The Hague, The Netherlands bas.binnerts@tno.nl, michael.ainslie@tno.nl.
authors.forename: Bas
authors.initials: B
authors.lastname: Binnerts
authors.affiliation: Netherlands Organisation for Applied Scientific Research (TNO), Acoustic and Sonar Group, P.O. Box 96864, 2509 JG, The Hague, The Netherlands bas.binnerts@tno.nl, michael.ainslie@tno.nl.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Ainslie