Field Calibration a Tool for Acoustic Noise Prediction: The CALCOM'10 Data Set

Conference Paper

Title: Field Calibration a Tool for Acoustic Noise Prediction: The CALCOM'10 Data Set
Publication Date:
November 01, 2010
Conference Name: IX Encontro de tecnologia em Acústica Submarina – IX ETAS
Conference Location: Arraial do Cabo, Brasil
Pages: 1-11
Publisher: Instituto de Estudos do Mar Almirante Paulo Moreira
Affiliation:
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Technology Type:

Document Access

Website: External Link
Attachment: Access File
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Citation

Felisberto, P.; Jesus, S.; Martins, N. (2010). Field Calibration a Tool for Acoustic Noise Prediction: The CALCOM'10 Data Set. Paper Presented at the IX Encontro de tecnologia em Acústica Submarina – IX ETAS, Arraial do Cabo, Brasil.
Abstract: 

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.

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