Interference of Underwater Noise Emitted by Drifting Vessel.

Using a Towed Array to Characterise the Underwater Acoustic Noise Radiated by the Tow-vessel

Ships and submarines radiate sound into the water as an inevitable by-product of the mechanical energy required to propel them. For military surface vessels the characteritics of the radiated underwater sound can be a critical factor in determining the vulnerability of the vessel to detection, and consequently considerable effort is put into characterising and minimising the radiation from thes...

Electromagnetic Interference Emitted from Electronic Devices

Measuring the level of electromagnetic interference emitted by electronic devices is an important part of the process of production and development of these devices. Today, these measurements are performed by specialized laboratories that are equipped with an anechoic or semi-anechoic chamber. For manufacturers of electronic devices, it would be beneficial if a Gigahertz Transversal Electromagn...

Investigating high frequency underwater vessel noise and potential masking of killer whale echolocation clicks

Validation of underwater radiated noise predictions for a merchant vessel using full-scale measurements

Underwater radiated noise (URN) was previously primarily of interest in connection with the signature of naval vessels. Recently it has become increasingly relevant for other vessel types, such as cruise and merchant ships, due to a growing concern that marine life is affected by rising anthropogenic noise levels in the oceans. Shipping is a main contributor to those noise levels, with the cavi...

Underwater Ambient Noise