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Until recently, research and applications in underwater acoustics was mainly driven by military needs such as sonar detection and mine warfare. With the increasing concern of the scientific community regarding the increase of underwater sound in the oceans related to anthropogenic activity (ship traffic, exploitation of ocean and seafloor resources), as well as the rapid development of systems based on unmanned underwater vehicles, the need for standards in underwater acoustics for the whole community, including civilian applications, has emerged. One of the main initiatives was the creation, a few years ago, of a committee dedicated to underwater acoustics in the ISO (International Standardization Organisation). A workplan was defined and different projects have been completed or are undergoing. Three standards have already been published: the 17208-1 on the measurement of radiated noise from ships, the 18405 on terminology and the 18406 on sound emitted by marine pile driving operations. Another project on the the calibration of imaging sonars is nearly completed. The purpose of this paper is to give an overview of the work completed and in progress. In a second part, the presentation focuses on the procedures for measurement of underwater radiated noise from ships. In particular, in order to retrieve a sound source level independent on the environment, it is necessary to correct the measurement from effects related to the reflection or interactions of acoustic waves on sea surface and sea floor.
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