underwater acoustics
21Acoustical Society of America — The Acoustical Society of America (ASA) is an international scientific society dedicated to increasing and diffusing the knowledge of acoustics and its practical applications.=History=The ASA was instigated by Wallace Waterfall, Floyd Watson, and …
22Marine pollution — While marine pollution can be obvious, as with the marine debris shown above, it is often the pollutants that cannot be seen that cause most harm. Marine pollution occurs when harmful, or potentially harmful effects, can result from the entry… …
23Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …
24Hydrophone — A hydrophone (Greek hydro = water and phone = sound ) is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when… …
25Paul D. Scully-Power — Infobox Astronaut name =Paul Desmond Scully Power type =U.S. Navy Payload Specialist nationality =American date birth =May 28, 1944 place birth =Sydney, Australia occupation =Oceanographer selection =1984 NASA Group time =8d 05h 23m mission =STS… …
26Acoustic Doppler Current Profiler — Head of an ADCP with the four transducers ADCP view ahead, mo …
27Bathymetry — Present day Earth bathymetry (and altimetry). Data from the National Geophysical Data Center s TerrainBase Digital Terrain Model. Bathymetry is the study of underwater depth of lake or ocean floors. In other words, bathymetry is the underwater… …
28Tsunami — For other uses, see Tsunami (disambiguation) …
29Abyssal fan — Abyssal Fans, also known as deep sea fans, underwater deltas, and submarine fans, are underwater structures that look like deltas formed at the end of many large rivers, such as the Nile or Mississippi Rivers. Abyssal fans are also thought of as… …
30Upwelling — If the wind in blows parallel to the coast in the southern hemisphere (such as along the coast of Peru, where the wind blows North), then Ekman transport produces a net movement of surface water 90 degrees to the left. This can result in coastal… …
