2019_programme: FEASIBILITY AND ACCURACY OF PREDICTION OF OCEAN NOISE ON A SHORT-TIME SCALE

Back


  • Session: 06. Underwater Noise - Modelling and Measurements
    Organiser(s): Gavrilov Alexander, Skarsoulis Emmanuel, Taroudakis Michael
  • Lecture: FEASIBILITY AND ACCURACY OF PREDICTION OF OCEAN NOISE ON A SHORT-TIME SCALE [invited]
    Paper ID: 913
    Author(s): Gavrilov Alexander , Mccauley Robert, Zhang Zhi Yong
    Presenter: Gavrilov Alexander
    Presentation type: oral
    Abstract: This study aims to examine the feasibility and accuracy of ocean ambient noise models to predict underwater noise spectra in a statistical way on a relatively short time scale from an hour to one day. The area around Perth Canyon west of Rottnest Island in Western Australia was chosen to verify a composite regional model of ocean noise. The model comprises components of physical origin, such as wind, sounds of great whales and fish choruses as biological components, and ship noise. Meteorological noise components are modelled using data from a weather station on Rottnest Island and models of wind driven underwater noise. Ship noise is modeled using Automatic Identification System data, including vessels’ type, size, position and speed, typical acoustic signatures of a few most common ship types, such as tanker, cargo and passenger ships and some smaller vessels, and underwater sound transmission models. The regional model of noise from whale calls was built using data on seasonal variations in the presence of great whales in the area and spectra of their typical sounds. Fish noise and its diel and seasonal variations linked to the sunset and sunrise times were modelled using data of long-term underwater noise measurements made in the area. Modelling predictions were compared with ocean noise measurements conducted in this area for nearly 10 years within the Integrated Marine Observing System program. The comparison has demonstrated that the model is capable of predicting the 50% percentile spectrum levels of ocean noise in 1/3-octave bands within a few decibels on a daily basis.
      Download the full paper
  • Corresponding author: Prof Gavrilov Alexander
    Affiliation: Centre for Marine Science and Technology, Curtin University
    Country: Australia
    e-mail:

Back