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Publication
Field calibration a tool for acoustic noise prediction. The CALCOM 10 data set
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Advisor(s)
Abstract(s)
It is widely recognized that anthropogenic noise affects the marine fauna, thus it becomes a major concern in
ocean management policies. In the other hand there is an increasing demand for wave energy installations
that, presumably, are an important source of noise. A noise prediction tool is of crucial importance to assess
the impact of a perspective installation. Contribute for the development of such a tool is one of the objectives
of the WEAM project. In this context, the CALCOM’10 sea trial took place off the south coast of Portugal,
from 22 to 24 June, 2010 with the purpose of field calibration. Field calibration is a concept used to tune the
parameters of an acoustic propagation model for a region of interest. The basic idea is that one can
significantly reduce the uncertainty of the predictions of acoustic propagation in a region, even with scarce
environmental data (bathymetric, geoacoustic), given that relevant acoustic parameters obtained by acoustic
inference (i.e. acoustic inversion) are integrated in the prediction scheme. For example, this concept can be
applied to the classical problem of transmission loss predictions or, as in our case, the problem of predicting
the distribution of acoustic noise due to a wave energy power plant. In such applications the accuracy of
bathymetric and geoacoustic parameters estimated by acoustic means is not a concern, but only the
uncertainty of the predicted acoustic field. The objective of this approach is to reduce the need for extensive
hydrologic and geoacoustic surveys, and reduce the influence of modelling errors, for example due to the
bathymetric discretization used. Next, it is presented the experimental setup and data acquired during the sea
trial as well as preliminary results of channel characterization and acoustic forward modelling.
Description
Keywords
Acoustic field calibration Equivalent acoustic model Acoustic inversion
Citation
P. FELISBERTO, N. MARTINS and S.M. JESUS, "Field Calibration a Tool for Acoustic Noise Prediction: the CALCOM'10 data set", IX Encontro de Tecnologia Acustica Submarina - IX ETAS, Arraial do Cabo, 2010, November