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| | Echo - Wikipedia, the free encyclopedia |
 | | Echo (album), any of several albums by this name. | | | Echo (song), a song by the nu metal group Trapt. | | | Echo (phenomenon), a natural acoustic phenomenon named for the nymph. |
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http://en.wikipedia.org/wiki/Echo
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| | echo sounder on Encyclopedia.com |
| | Global IP Sound Acoustic Echo Technology Used in Newly Released Logitech ViewPort AV 100. | | | Global IP Sound Releases New Version of Acoustic Echo Canceller; GIPS AEC Version 1.3 Has Improved Handling of Double Talk and Other PC-Specific Acoustics. | | | The time interval between the initiation of a sound pulse and echo returned from the bottom can be used to determine the depth of the bottom. |
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http://www.encyclopedia.com/html/e1/echosoun.asp
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| | NOAA Ocean Explorer: History: Age of Electronics (1923-1945) |
| | Concurrent with the development of echo sounding, the CandGS developed radio acoustic ranging (RAR). | | | The development of echo sounding continued in the ensuing years. | | | Early magnetometers, scanning sonars for submarine detection, and acoustic sounding instruments all led to a greater understanding of the oceans and the sea floor. |
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http://oceanexplorer.noaa.gov/history/electronic/electronic.html
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| | HOW DO YOU MAP THE OCEAN FLOOR WITH THE HMR-1 |
| | Echo sounding gives you a good idea at what the formations look like and maybe what they are made of, but it is only two dimensional. | | | One is called bathymetry and the other is echo sounding. | | | The echo sounding is measuring how strong or loud the signal comes back. |
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http://utdallas.edu/dept/sci_ed/Melville/HOW-DO-YOU-MAP-THE-OCEAN-FLOOR.htm
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| | NOAA Ocean Explorer: Echo Sounding Reading |
| | Echoes, which are made by sounds reflected back to you, are heard on all sides and by everybody, you are so used to hearing them that they are seldom noticed unless the echo is heard at a considerable time interval after the sound is produced. | | | Reginald A. Fessenden and whether he received echoes from the iceberg seems to be omitted from the record. | | | The sounds themselves do the work by being reflected from the bottom of the ocean as echoes. |
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http://oceanexplorer.noaa.gov/library/readings/echosounding/echosounding.html
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| | NOAA Photo Library - Sounding Pole to Sea Beam |
| | Concurrent with improvements in recording devices were improvements in the sound projectors and receivers used for echo sounding. | | | An operator with earphones listening for the return signal transmitted a sound signal through the water at the precise instant the return echo was heard. | | | They followed this success with 4000 meter echo soundings from the cable ship CHARENTE in the Bay of Biscay. |
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http://www.photolib.noaa.gov/historic/c&gs/sound.html
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| | Multibeam echo-sounding sonars |
| | In addition to soundings, the system calculates an acoustic image of the seabed, which is similar to a sidescan sonar image. | | | This provides complementary information to the soundings and can help to discriminate seabed types from their acoustic backscatter (e.g. | | | Water levels can be recorded to an accuracy of 0.1% for a period of anything up to 2 years. |
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http://www.ocean.cf.ac.uk/people/neil/jrei
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| | Nat' Academies Press, The Silent Landscape: The Scientific Voyage of HMS Challenger (2003) |
| | He heard the sound of the detonation and a fraction of a second later another, smaller explosion which he took to be the echo of the main blast off the seafloor. | | | It was Hayes who overcame the final problem of echo sounding: measuring the time interval between the transmitted and received sound pulses with sufficient accuracy. | | | It took the tragedies of Titanic and Lusitania in the early twentieth century to renew interest in echo sounding as a way to detect unseen obstacles at sea. |
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http://www.nap.edu/openbook.php?record_id=10725&page=30
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| | G519B - Current Topics in Glaciology: Radio Echo Sounding - Winter 2001 |
| | Radio Echo sounding is a major activity for many of us. | | | Last quarter's exploration of the literature about Lake Vostok brought up a number of questions concerning echo sounding. | | | G519B - Current Topics in Glaciology: Radio Echo Sounding - Winter 2001 |
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http://geophys.washington.edu/Surface/Glaciology/COURSES/G519B/winter01.htm
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| | The application of remote sensing technology to marine fisheries: an introductory manual |
| | Figure 8.6 Dimensions of the sound beam form the echo sounder at 20 m echo depth in relation to the distance between trawl doors and wind ends of the trawl net. | | | Figure 8.7 Example of “Type A” echo recordings of demersal ans semi- demersal fish. | | | Figure 8.8 Example of “Type B” echo recordings of dispersed pelagic fish. |
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http://www.fao.org/docrep/003/t0355e/T0355E08.htm
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| | GeoConnections - Data - Data Details |
| | Analog records are oscilloscope traces and snapshots of Z-mode radar echo sounding data. | | | Technical University of Denmark echo sounding flights in 1971/72, 1974, 1978 and 1979 produced data for Greenland that are also archived at NSIDC. | | | Gudmandsen, P., Studies of ice by means of radio echo sounding, Technical University of Denmark, Electromagnetics Institute, Report 162, 22 p., 1976. |
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http://cgdi.gc.ca/CGDI.cfm/fuseaction/data.details/id/29/gcs.cfm
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| | The polarization of radio signals in the radio echo sounding of ice sheets |
| | The radio echo is shown to be elliptically polarized, confirming the suggestion that the ice sheet is birefringent at radio frequencies. | | | Particular attention is given to those aspects of the theory which relate to the radio echo sounding of ice sheets. | | | The polarization of radio signals in the radio echo sounding of ice sheets |
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http://stacks.iop.org/0022-3727/10/1285
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| | Quarterdeck (6.3) Online -- Texas A&M Oceanography |
| | The echo sounder times the return of that signal from the ocean bottom. | | | The echo sounder enabled ships to routinely make thousands of depth measurements while crossing the oceans, and it became possible to make modern bathymetry (ocean depth) charts. | | | Can you make a profile from this actual echo sounding data from an area near Iceland? |
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http://www-ocean.tamu.edu/Quarterdeck/1998/3/sager-2.html
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| | Radio-Echo Sounding of Ice Sheets and Glaciers I - Cryosphere [C] |
| | Subglacial echoes are influenced by the physical properties of the interface such as the composition and roughness of the materials at the interface. | | | High and low-gain channels allow for recording a wide dynamic range of echoes simultaneously and without range-dependent gain control. | | | We apply these techniques to several locations in West Antarctica, where isochrones have been located using radar echo sounding. |
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http://www.agu.org/meetings/fm04/fm04-sessions/fm04_C41D.html
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| | Definition: echo sounding |
| | echo sounding: The measurement of the depth of a body of water or the distance to an object in a body of water by measuring the time it takes sound or electromagnetic waves of known velocity to reflect from the bottom of the water body or from the distant object. | | | Note: In echo sounding, damped cw transmission is usually used. | | | This HTML version of Telecom Glossary 2K was last generated on Wed May 8 15:36:48 MDT 2002. |
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http://www.its.bldrdoc.gov/projects/devglossary/_echo_sounding.html
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| | echo sounding - Hutchinson encyclopedia article about echo sounding |
| | The animal emits a stream of high-pitched sounds, generally at ultrasonic frequencies (beyond the range of human hearing), and listens for the returning echoes reflected off objects to determine their exact location. | | | The location of an object can be established by the time difference between the emitted sound and its differential return as an echo to the two ears. | | | Bats vary in the way they use echolocation: some emit pure sounds lasting up to 150 milliseconds, while others use a series of shorter ‘chirps’. |
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http://encyclopedia.farlex.com/echo+sounding
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| | Wordsmyth |
| | a method of determining the depth of a body of water by measuring the time the echo of an emitted sound wave takes to return from the bottom. |
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http://wordsmyth.net/live/home.php?script=search&matchent=echo+sounding&...
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| | Home Recording dot com BBS - Best sounding Delay/Echo pedal for live rig? |
| | I am using a Boss DD-3 right now, and am looking for more of an "Echo" sound than a digital delay repeat - but longer than what is considered a reverb. | | | Just something that sounds more "roomy" or ambient sounding than a regular slap back type delay. | | | Advice on NI Guitar Rig from those who own one. |
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http://homerecording.com/bbs/showthread.php?t=174017&goto=newpost
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| | Radio-Echo Sounding: References |
| | Welch, B.C., W.T. Pfeffer, J.T. Harper, N.F. Humphrey, (1998) Mapping subglacial surfaces beneath temperate valley glaciers by 2-pass migration of radio echo sounding data, J. of Glaciology, v. | | | Welch, B.C., W.T. Pfeffer, J.T. Harper, N.F. Humphrey, (1997) Mapping of englacial water-filled conduits with 3-dimensional radio echo sounding, [abs.], Eos (Transactions, American Geophysical Union), v. |
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http://www.stolaf.edu/people/radar/background/radrefs.html
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| | Archaeology Wordsmith |
| | Most echo sounders perform these calculations mechanically, producing a graphic record in the form of a paper chart. | | | DEFINITION: An acoustic underwater survey technique used to trace the topography of submerged land surfaces. | | | Misleading reflections caused by the presence of undersea canyons or mountains plus variations in the speed of sound through water caused by differences in temperature, depth, and salinity limit the accuracy of echo sounding. |
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http://www.reference-wordsmith.com/cgi-bin/lookup.cgi?category=&where=headword&terms=echo-sounding
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| | Dive and Discover : Sonar : Echo Sounding |
| | Scientists typically use echo sounders that transmit sound at 12 kiloHertz (kHz) to determine how far down the seafloor lies. | | | Dive and Discover : Sonar : Echo Sounding | | | The returned echo is received by the transducer, amplified electronically, and recorded on graphic recorders. |
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http://www.divediscover.whoi.edu/tools/sonar-singlebeam.html
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| | [No title] |
| | To convert an echo sounding to depth, the travel-time measurement is commonly halved and multiplied by an assumed speed of sound through seawater, either 4,800 ft/sec, 800 fathoms/sec or 1,500 m/sec. | | | BATHYMETRIC DATA DATA ANNOUNCEMENT 84-MGG-18 ECHO-SOUNDING CORRECTION TABLES FOR COMPUTER USE ("Matthews' Tables" - Carter's 3rd Edition) An echo sounding is measurement of the two-way travel time of an acoustic signal between a shipborne transducer and a submerged reflecting surface, usually the ocean bottom. | | | Traditionally, corrections to echo soundings have been interpolated for various areas of the world's oceans from tables published by D.J. Matthews in 1939.* Though the Matthews tables are long outdated, their continued use allowed new depth values to be merged with the large existing data base of depths derived similarly. |
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http://www.ngdc.noaa.gov/mgg/fliers/84-MGG-18
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| | Hunting - Glossary - Discover The Outdoors |
| | Determination of the depth of water by measuring the time interval between emission of a sonic or ultrasonic signal and the return of its echo from the bottom. | | | The determination of distance by measuring the time interval between transmission of a radiant energy signal (sound) and the return of its echo. | | | In acoustics, a signal which has been reflected or otherwise returned with sufficient magnitude and time delay to be detected as a signal distinct from that directly transmitted |
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http://www.dto.com/hunting/glossary/index.jsp?startwith=e
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| | Echo Sounding Correction Tables (Third Ed., Computerized Version) |
| | In 1980 a Third Edition of Echo Sounding Tables was published by the UK Hydrographic Office to replace Matthews Tables. | | | the computerised echo sounding correction area definitions and correction tables). | | | As the boundaries between echo sounding correction areas lie along exact degrees of latitude and longitude, the tables are particularly suited for automatic use on computerised systems. |
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http://gcmd.gsfc.nasa.gov/records/GCMD_BODC_Echo_Sounding_Tables.html
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| | Radio-Echo Sounding of Ice Sheets and Glaciers II Posters - Cryosphere [C] |
| | Second, the echoes have constant strength along the record track, which is indicative of an interface that is smooth on the scale of the radio wavelength. | | | A Study of Radar Echo Sounding Response and Clutter Using Data From Jakobshavn, Greenland | | | Detection of subglacial lakes in airborne radar sounding data from East Antarctica. |
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http://www.agu.org/meetings/fm04/fm04-sessions/fm04_C43A.html
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| | Designations Of U.S. Military Electronic And Communications Equipment |
| | WC- Combined Sounding-Ranging (R/S Sounding) (M/S & R/S Ranging & Listening). | | | WD- Combined Sounding-Ranging (R/S Sounding) (M/S & R/S Ranging & Listening) WE- Combined Lightweight M/S Echo Ranging with sounding feature removed. | | | 55 Indicators and Recorders: Radio, radar, and underwater sound. |
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http://www.designation-systems.net/usmilav/electronics.html
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| | ePIC: Airborne Radio Echo Sounding Measurements from Novolazarevskaya Skiway, Central Dronning Maud Land, Antarctica |
| | This paper reports about the technique used for the airborne radio echo sounding measurements, the logistic setup and results of the airborne radio echo sounding survey. | | | ePIC: Airborne Radio Echo Sounding Measurements from Novolazarevskaya Skiway, Central Dronning Maud Land, Antarctica | | | Meyer, U., Steinhage, D., Nixdorf, U., Miller, H. Airborne Radio Echo Sounding Measurements from Novolazarevskaya Skiway, Central Dronning Maud Land, Antarctica |
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http://www.awi-bremerhaven.de/Publications/Mey2003a_abstract.html
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| | Submarine Sonar Operator's Manual - Chapter 5 |
| | The remaining parts of the WCA are concerned with echo-ranging or depth sounding. | | | For echo-sounding, there is a depth indicator in the control room. | | | In the receiver-amplifier, the small electric current is strengthened and changed so that it is heard as sound in the phones or speaker. |
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http://www.maritime.org/fleetsub/sonar/chap5.htm
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| | Echo sounding - Wikipedia, the free encyclopedia |
| | As well as accident avoidance (most larger vessels will have at least a simple depth sounder), echo sounding is commonly used for fishing. | | | Most charted ocean depths use an average or standard sound speed. | | | Echo sounding is effectively a special purpose application of sonar used to locate the bottom. |
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http://en.wikipedia.org/wiki/Echo_sounding
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| | The Hydrographic Society - Forum - Q&A Echo Sounders and Echo Sounding |
| | I assume that you have proven that both your echo sounders are in calibration using a bar-check. | | | The Hydrographic Society - Forum - QandA Echo Sounders and Echo Sounding | | | So go on - ask that question that's been getting the better of your curiosity for so long - it'll just take a couple of minutes to ask the question and think how many other people might be grateful for the answer too. |
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http://www.hydrographicsociety.org/Forum/questions/Echo-Sounders-and-Echo-Sounding.htm
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| | CSDL Publications |
| | Eisler, T.J. "Errors Associated with Sound Speed Corrections in Echo Sounding. | | | "Classical Electrodynamics and Acoustics: Sound Prediction by Moving Multipoles," Journal of Vibration and Acoustics, 119, 1997, pp. | | | "Classical Electrodynamics and Acoustics II: Sound Radiation by Moving Quadrupoles", 1997. |
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http://www.chartmaker.ncd.noaa.gov/csdl/PUB.HTML
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| | International Glaciological Society (IGS) » Journal of Glaciology, Volume 15 |
| | Electromagnetic characteristics of sea ice in the metre and decimetre ranges, and its radio- echo sounding | | | On some aspects of the interaction of the pulse and the medium during the vertical echo sounding of glaciers | | | Investigation of sub-ice bedrock characteristics by radio-echo sounding |
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http://www.igsoc.org/journal/15
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| | Radio-Echo Sounding: Data Processing |
| | The ice and bedrock surfaces of a portion of the Worthington Glacier obtained in the 1996 radio echo sounding survey. | | | We use a distance-weighted window to smooth the surfaces. |
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http://www.stolaf.edu/people/radar/background/raddata.html
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| | AgexMH |
| | AGE 1 22 Sept. 1956; Time 1015; Depth (meters) echo sounding, 120; Wire, 130; 16° 54.5'N, 100° 11.5'W. 22 Sept. 1956; Time, 1021; Depth (meters) echo sounding, 120; Wire, 126; 16° 54.6'N, 100° 11.5'W. 22 Sept. 1956; Time, 1059; Depth (meters) echo sounding, 238; Wire, 279; 16° 52.4'N, 100° 12.2'W. No core.) | | | 1956; Time 1251-1300; Depth (meters) echo sounding 1040; Wire 1800; | | | Water depths determined from Echo Sounder and "Wire Meters out" |
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http://gc.ucsd.edu/data/agexMH.htm
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| | echo sounding (HyperDic hyper-dictionary) |
| | Determining the location of something by measuring the time it takes for an echo to return from it. | | | ECHO SOUNDING products: USA, UK, Canada, Deutschland, France. |
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http://www.hyperdic.net/dic/echo_sounding.htm
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| | Find in a Library: Echo sounding and sonar for fishing. |
| | Find in a Library: Echo sounding and sonar for fishing. | | | WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries. |
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http://worldcatlibraries.org/wcpa/ow/66a66a0b08a12096a19afeb4da09e526.html
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| | ITTC Publications |
| | An Improved Radio Echo Sounder for the Measurement of the Greenland Ice Sheet Thickness, | | | An Airborne Radio Echo Sounder for the Measurement of the Greenland Ice Sheet Thickness, | | | Radio Echo Sounding of Outlet Glaciers, Western Greenland, |
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http://www.ittc.ku.edu/publications/index.phtml
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| | Radio-Echo Sounding: Field Work |
| | Radio-echo sounding surveys have been recorded there in support of ice-dynamics research by the | | | The appropriate field methods for gathering Radio-Echo Sounding (RES) data depend upon the objective of the survey. | | | If a researcher simply wants a rough estimate of the glacier thickness, only a couple readings might suffice. |
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http://research.gg.uwyo.edu/iceradar/radfield.html
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| | Radio echo sounding |
| | Ice sounding radar or radio echo sounding (RES) is the method of using pulses of radio frequency energy to measure ice thickness, obtain information about the nature of the underlying terrain and the bulk properties of the ice column. | | | To date the deepest ice sounded by the aircraft system is 3.5 km and information on the nature and texture of the basal surface can be obtained from the strength of the return echo. | | | The origins of RES can be traced back to the early 1930's, where aircraft pilots noticed that when using the then newly developed radar altimeters in the polar regions the surface echos were corrupted by echos from the bottom of glaciers. |
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http://www.antarctica.ac.uk/Resources/GSD/gsd_res.html
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| | Jacobsen, F.M. 1996. GGG |
| | Indeed, it is possible to connect the system to a data logger to collect sounding data at pre-programmed intervals at the same location, a technique used on Variegated Glacier, Alaska, USA to study the effects of internal water bodies on radio-echo returns (Jacobel and Anderson 1987). | | | The Mk 2 model has a simpler amplifier/filter unit, designed primarily to process signals to aid identification of a bottom return echo. | | | 1) with a time variable gain (TVG) system for use on thick ice, where identification of the bottom return echo can be difficult because of attenuation of the return signal. |
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http://boris.qub.ac.uk/ggg/papers/full/1996/rp02/rp02pr.html
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| | Radar echo sounding |
| | Miniature high-power impulse transmitter for radio-echo sounding, J. | | | This DOS software package for collecting and displaying radar echo data is also available from its author, Dr. Garry Clarke, University of British Columbia (tel: 604-822-3602/fax: 604-822-6047). | | | This sheath is not recommended for wet environments because the antenna may be damaged should it be handled when the sheath is frozen. |
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http://www.icefield.yk.ca/www/products/radar/radar.htm
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| | Measurement of thickness of ice sheets and glaciers |
| | Radio-echo sounding (RES), utilizing a variety of radio frequencies, was developed to allow glaciologists to measure the thickness of ice sheets and glaciers. | | | Investigations of the form and flow of ice sheets and glaciers using radio-echo sounding | | | We review the nature of electromagnetic wave propagation in ice and snow, including the permittivity of ice, signal attenuation and volume scattering, along with reflection from rough and specular surfaces. |
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http://stacks.iop.org/0034-4885/67/1821
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| | Echo-Sounding Correction Tables |
| | The tables were computerized by Carter and offer standard velocity-depth corrections for 85 different regions covering the globe. | | | For conversion of raw echo-sounding measurements of ocean depths to values compensated for variations of sound speed with regional density profiles. |
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http://gcmd.gsfc.nasa.gov/records/GCMD_FE00510.html
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