Shallow Water Effects on Ship Underwater Noise Measurements

Tuomas Sipilä, Ville Viitanen, Seppo Uosukainen, Rhena Klose

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The underwater noise of icebreaker Polaris was measured in shallow water. The measurements were conducted using one hydrophone at the sea bottom and three hydrophones at intermediate depths. The noise measurements were analysed in this paper at port side passes at 11 knots speed. Transmission loss was investigated in shallow water for ranges typical in noise trials between the target ship and the measurement location. The transmission loss at different depths and frequencies was analysed from the measurements. The measured transmission loss was compared to the results of acoustic propagation models. The sensitivity of transmission loss to bathymetry and seabed sediment characteristics was studied numerically by systematically varying bottom geometry and its acoustic properties. The noise measurements conducted with two different methods gave relatively close results although the measurements were done in water depths not reaching the minimum levels of classification notations. The numerical simulations revealed the complicated underwater acoustic environment present in shallow waters.
Original languageEnglish
Title of host publicationProceedings of Inter-Noise 2019
EditorsAntonio Calvo-Manzano, Ana Delgado, Antonio Perez-Lopez, Jose Salvador Santiago
Place of PublicationMadrid
PublisherInstitute of Noise Control Engineering
Number of pages12
ISBN (Electronic)978-84-87985-31-7
Publication statusPublished - 16 Jun 2019
MoE publication typeA4 Article in a conference publication
Event48th International Congress and Exhibition on Noise Control Engineering, Inter-Noise 2019 - Madrid, Spain
Duration: 16 Jun 201919 Jun 2019
Conference number: 49

Publication series

SeriesInter-noise: International Conference on Noise Control Engineering
ISSN0105-175X

Conference

Conference48th International Congress and Exhibition on Noise Control Engineering, Inter-Noise 2019
Abbreviated titleInter-noise 2019
CountrySpain
CityMadrid
Period16/06/1919/06/19

Keywords

  • Underwater noise
  • ship
  • Shallow water

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