The underwater sound levels of Lithuanian marine harbour

Bagočius, Donatas; Narščius, Aleksas

doi:10.1016/j.marpolbul.2022.114335

Cited by 2 publications

(1 citation statement)

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“…The overlapping and gradual coupling of noise generated by natural processes and human activities in shallow coastal areas has become a complex mechanism that collectively affects the marine ecosystem alongside the survival and development of the environment. For example, aquatic animals rely on sound for communication, navigation, predation, or avoiding predation in turbid waters, and the acoustic environment of their habitats plays an important role in their lives [9]. On the one hand, tidal and tidal-current processes can change the movement and propagation of these noise sources, thereby affecting noise levels in the underwater environment.…”

Section: Introductionmentioning

confidence: 99%

Underwater Noise Characteristics of the Tidal Inlet of Zhanjiang Bay

Huo,

Zhang,

Yuan

et al. 2023

Water

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The coupling mechanism between natural and anthropogenic noise in shallow marine areas is of great significance for maintaining the ecological safety of these regions. In this study, a section of Zhanjiang Bay’s entrance was selected as a typical research area, and environmental noise data at different depths were collected during the spring and autumn seasons. The spectral characteristics, sound pressure levels, and underwater noise frequency correlation matrices of environmental noise were analyzed to reveal the underwater noise characteristics of tidal channels in Zhanjiang Bay and their main influencing factors. The results show that underwater noise in this study area had a stable frequency band distribution. In the low-frequency range of 20–50 Hz, the main source of noise was the flow noise influenced by tides and topography, with a peak sound pressure level of approximately 97 dB. In the frequency range of 50 Hz to 500 Hz, the main noise sources were ships at sea, followed by wind-generated noise. At frequencies above 500 Hz, the noise intensity decreased. In addition, it was found that the sound pressure level in the low-frequency range had a significant correlation with the tidal level, increasing with the rise of the tide and decreasing during low tides. This study provides a research case on the impact that human noise activity has on environmental noise in shallow marine bays. These research findings can support the selection of sites and reduce construction noise from offshore wind farms, as well as ensure the acoustic ecological environment in the vicinity of marine ranches.

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Section: Introductionmentioning

confidence: 99%