2019_programme: MONITORNING OF ANTHROPOGENIC UNDERWATER NOISE IN THE VENICE LAGOON ITALY

• Session: 06. Underwater Noise - Modelling and Measurements
  Organiser(s): Gavrilov Alexander, Skarsoulis Emmanuel, Taroudakis Michael
• Lecture: MONITORNING OF ANTHROPOGENIC UNDERWATER NOISE IN THE VENICE LAGOON ITALY
  Paper ID: 793
  Author(s): Tegowski Jaroslaw, Madricardo Fantina, Kruss Aleksandra, Zdroik Jakub, Janowski Lukasz
  Presenter: Tegowski Jaroslaw
  Presentation type: oral
  Abstract: Underwater noise levels of anthropogenic origin have been increasing in the seas and oceans since the end of the World War II. It has a very negative impact on the life of marine organisms, disturbing their functioning and, in extreme cases, can lead to their death.Noise pollution is particularly noticeable in sea straits, along shipping routes as well as in areas with heavy traffic. The Venice Lagoon and its major canals are an example of particularly high traffic of vessels from cargo and passenger ships to water trams (vaporetto) and fast recreational motorboats. In January and July 2018, we conducted underwater noise measurements in this area, deploying at a depth of 4m a hydroacoustic buoy SM2M of the WildeLife Acoustics company near the island of Certosa in the St. Nicola channel, which recorded the ambient noise at the sampling frequency of 96kHz.The maximum values of Averaged Noise Spectrum Level and Sound Pressure Level were in the frequency band between 600Hz and 800Hz corresponding to the underwater noise emitted by high-speed motor boats. For this frequency range, the average Sound Pressure Level was much higher than 110dB re 1uPa^2. Recognition and quantification of noise events was carried out in the 1/3 octave frequency bands. In addition, statistical, spectral and wavelet analysis parameters of underwater noise were calculated as input data to the Principal Components Analysis algorithm and fuzzy logic clusters algorithm, which allowed for automatic detection of noise generated by ships and motor boats from underwater ambient noise.
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• Corresponding author: Dr Tegowski Jaroslaw
  Affiliation: University of Gdansk
  Country: Poland
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