Airborne noise emissions from ships can be a significant source of annoyance. Therefore, it is important to accurately predict ship noise in order to get an effective environmental noise control in planning new ports, or in widening existing harbor, or in locating new mooring positions. To test the reliability of current commercial simulators in predicting the noise field from complex sources such as ships, in the present work the airborne noise propagation from two different vessels was modelled: a Multipurpose Ship and a Fishing Research Vessel. The development of the model for both ships was performed in five steps: acquisition of the input data; modelling of the ship in the sound propagation software; definition of the noise sources; model validation; output data generation. Simulated data were then compared with on field measurements. The obtained results rise some questions about the measurement techniques adopted to characterize the source levels and the validation data, the simplifications made on the ship surface and the typologies of sources utilized in the study. Future developments in numerical simulators are needed in order to better describe outdoor noise propagation from ships, taking into account the specific nature and complexity of such sources.

Modelling the outdoor noise propagation for different ship types

Badino, Aglaia;Borelli, Davide;Gaggero, Tomaso;Rizzuto, Enrico;Schenone, Corrado
2012

Abstract

Airborne noise emissions from ships can be a significant source of annoyance. Therefore, it is important to accurately predict ship noise in order to get an effective environmental noise control in planning new ports, or in widening existing harbor, or in locating new mooring positions. To test the reliability of current commercial simulators in predicting the noise field from complex sources such as ships, in the present work the airborne noise propagation from two different vessels was modelled: a Multipurpose Ship and a Fishing Research Vessel. The development of the model for both ships was performed in five steps: acquisition of the input data; modelling of the ship in the sound propagation software; definition of the noise sources; model validation; output data generation. Simulated data were then compared with on field measurements. The obtained results rise some questions about the measurement techniques adopted to characterize the source levels and the validation data, the simplifications made on the ship surface and the typologies of sources utilized in the study. Future developments in numerical simulators are needed in order to better describe outdoor noise propagation from ships, taking into account the specific nature and complexity of such sources.
9788890439421
9788890439445
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/930034
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 10
  • ???jsp.display-item.citation.isi??? ND
social impact