Acoustic Properties of Marine Animals Forming Deep Scattering Layers of the Ocean
- The World of Sound. Crocker, Malcolm J. // International Journal of Acoustics & Vibration;Jun2013, Vol. 18 Issue 2, p50
The article discusses papers published within the issue, including "Sound in the Ocean: Acoustical Interactions With Marine Animals," by Mardi Hastings and "Numerical Prediction of the Signature of Maritime Platforms," by Nicole Kessissoglou.
- Surround Sound. Rizzo, Johnna // National Geographic;Sep2012, Vol. 222 Issue 3, following p24
The article presents information about a technology developed by University of Texas acoustic scientists which uses bubble-like air pockets to surround underwater machinery such as drilling rigs in order to reduce the noise they transmit and thereby aid communication by ocean animals.
- underwater sound. Indle, Christ T. // New Zealand Science Teacher;2009, Issue 121, p10
The article focuses on the detection and measurement of underwater sound. Underwater microphone, called hydrophone, is used to detect underwater sound. It is noted that many marine animals are using underwater sound to find their prey. Echo sounders are developed to measure the depth of water. A...
- UN recognizes dangers of ocean noise. // Earth Island Journal;Summer2006, Vol. 21 Issue 2, p14
The article reports that the International Ocean Noise Coalition (IONC), under the coordination of Dr. Marsha Green of the Ocean Mammal Institute, successfully lobbied the UN Law of the Sea. From the work of the IONC, of which International Marine Mammal Project is a founding and active member,...
- Sound scattering by hydrodynamic wakes of sea animals. Selivanovsky, Dmitry A.; Ezersky, Alexander B. // ICES Journal of Marine Science / Journal du Conseil;Apr1996, Vol. 53 Issue 2, p377
It was observed that the hydrodynamic wake of sea animals such as squid or dolphin can have a considerably greater target strength than that of the animal itself.
- Multiple sound scattering by densely packed shoals of marine animals. Andreeva, I. B.; Belousov, A. V. // ICES Journal of Marine Science / Journal du Conseil;Apr1996, Vol. 53 Issue 2, p323
Brief information on packing density and size of fish and krill oceanic shoals is given. The sound field scattered by a mass of discrete inhomogeneities is calculated using the modified B�rn approximation. For shoals of the above-mentioned animals, a validity range for the single scattering...
- Quantifying movement of the tropical Australian cubozoan Chironex fleckeri using acoustic telemetry. Gordon, M.; Seymour, J. // Hydrobiologia;Dec2008, Vol. 616 Issue 1, p87
Cubomedusae are considered to have superior swimming abilities compared to other pelagic cnidarians, yet many of the theories describing such behaviours are based on anecdotal evidence, sting records or opportunistic sightings, rather than quantitative data. Acoustic telemetry was used to...
- counting fish using acoustics. Macaulay, Gavin; O'Driscoll, Richard; Gauthler, Stéphanie // New Zealand Science Teacher;2009, Issue 121, p27
The article offers information on fisheries acoustics or echo sounding, a technique that uses underwater sound to research the behaviour, distribution, and abundance of aquatic organisms. It is stated that fisheries acoustics is based on the transmission of sound waves into water. An echo...
- Ocean Commotion. Kessler, Rebecca // Natural History;
The article discusses research being done on the increase in the low-frequency noise from ships by ten decibels. It references a study by Mark A. McDonald et al, published in the 2006 issue of the "Journal of the Acoustical Society of America." In the 1960s the U.S. Navy recorded ambient noise...