Ocean Noise

11. Ocean Noise.jpg

Dublin Core

Title

Ocean Noise

Subject

Marine, Ocean, Sea, passive acoustic monitoring, shallow water, pinnipeds, anthropogenic sound, auditory masking

Description

Passive acoustic monitoring (PAM) is widely used as an initial step towards an assessment
of environmental status. In the present study, underwater ambient sound recordings from two
monitoring locations in marine-protected areas (MPAs) of the Gulf of Riga were analysed. Both
locations belong to the natural habitat of pinnipeds whose vocalisations were detected and analysed.
An increase of vocal activity during the mating period in the late winter was revealed, including
percussive signallings of grey seals. The ambient sound spectra showed that in the current shallow
sea conditions ship traffic noise contributed more in the higher frequency bands. Thus, a 500 Hz
one-third octave band was chosen as an indicator frequency band for anthropogenic noise in the
monitoring area. It was shown that changes in the soundscape occurring during the freezing period
create favourable conditions for ship noise propagation at larger distances. Based on the monitoring
data, the environmental risks related to the anthropogenic sound around the monitoring sites were
considered as low. However, further analysis showed that for a small percentage of time the ship
traffic can cause auditory masking for the ringed seals.

Creator

Editors
Michel Andr´e
Christine Erbe

Source

https://www.mdpi.com/books/book/5609-ocean-noise

Publisher

MDPI

Date

2022

Contributor

Jadik Wijayanto

Rights

The book as a whole is distributed by MDPI under the terms and conditions of the Creative Commons
license CC BY-NC-ND.

Relation

https://www.mdpi.com/books

Format

PDF

Language

English

Type

Textbooks

Identifier

ISBN 978-3-0365-4377-2 (Hbk)
ISBN 978-3-0365-4378-9 (PDF)

Coverage

St. Alban-Anlage 66
4052 Basel, Switzerland

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