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.
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
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.
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)
ISBN 978-3-0365-4378-9 (PDF)
Coverage
St. Alban-Anlage 66
4052 Basel, Switzerland
4052 Basel, Switzerland