Pubblicazione scientifica

Shipping noise field calibration via source inversion

FILONE TECNOLOGICO	TEMA
produzione e cattura

RIASSUNTO

There is significant evidence that the low-frequency mean acoustic noise pressure level in the ocean has been constantly increasing in the last decades. The main noise sources responsible for this increase were identified as ship traffic, offshore construction and oil & gas surveying. The Portuguese Navy funded SUBECO project aims at deploying a network of multiparametric offshore buoys for environmental and acoustic monitoring. A preferred location for the individual buoys is within or close by the ship traffic separation lanes along the west coast of Portugal. It is therefore expected that the received acoustic field will be dominated by shipping noise as a mixture of both short and long range ships. Most ships will have an AIS so their position may be known at all times. One of the objectives of this network is to use the recorded sound to infer and calibrate model predicted noise in a wider area. This work proposes a relatively simple technique for estimating the radiated noise level of ship tracks within acoustic reach of a single (or a small number of closely localized) hydrophone(s). It is expected that the data constrained predicted field with the estimated source levels will provide a better fit to the actual wide area acoustic field. This work is a contribution to fulfill the requirements of Portugal to the European Union Marine Strategy Framework Directive (MSFD) aiming at a good environmental status.

DATA

Data di pubblicazione: 01/06/2017

AUTORI

SERGIO M JESUS
CRISTIANO SOARES
FRIEDRICH ZABEL

ENTE DI AFFERENZA

LARSYS UNIV ALGARVE CAMPUS DE GAMBELAS 8005 139 FARO PORTUGAL
MARSENSING CAMPUS DE GAMBELAS 8005 139 FARO PORTUGAL

RIVISTA

OCEANS 2017 - Aberdeen (Page(s): 1-6)

IMPACT FACTOR

N.D.

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