Echo - AbsoluteAstronomy.com

Echo most commonly refers to Echo (phenomenon)

Echo (phenomenon)

In audio signal processing and acoustics, an echo is a reflection of sound, arriving at the listener some time after the direct sound. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. A true echo is a single...

, the reflection of a sound.

It may also refer to:

Science and technology

Echo satellite
Echo satellite
Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of them from one point on Earth to another.-Echo 1:NASA's Echo 1...

, one of the first communications satellites
EChO
EChO
The Exoplanet Characterisation Observatory is a proposed space telescope that has been selected for further studies as part of the Cosmic Vision roadmap of the European Space Agency, and is competing with three other missions for the M3 slot in the programme.EChO will be the first dedicated...

, a proposed European Space Agency mission to study exoplanet atmospheres.
Echo sounding
Echo sounding
Echo sounding is the technique of using sound pulses directed from the surface or from a submarine vertically down to measure the distance to the bottom by means of sound waves. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes...

, a way to measure water depth
Light echo
Light echo
thumb|right|250px|Reflected light following path B arrives shortly after the direct flash following path A but before light following path C. B and C have the same apparent distance from the star as seen from [[Earth]]....

, a visual phenomenon
Signal reflection
Signal reflection
Signal reflection occurs when a signal is transmitted along a transmission medium, such as a copper cable or an optical fiber, some of the signal power may be reflected back to its origin rather than being carried all the way along the cable to the far end. This happens because imperfections in the...

, a concept in telecommunications
ECHO Clearinghouse
ECHO Clearinghouse
ECHO Clearinghouse refers to a system used by the National Aeronautics and Space Administration to spatially, temporally and otherwise index the petabytes of data that NASA's Earth Science projects collect. It does not hold the data itself, but serves as a search engine that other applications can...

, NASA's registry of Earth Science data and services, an early SOA example

Computing

Echo (command), a Unix, DOS and Microsoft Windows command to display a line of text
Echo (computing)
Echo (computing)
In computing, echo is a command in DOS, OS/2, Microsoft Windows, Singularity, Unix and Unix-like operating systems that places a string on the computer terminal...

, a feature of telecommunications protocols
Echo (framework)
Echo (framework)
Echo is a web application framework that was created by the company NextApp. It originally started as a request-response web application framework that leveraged the Swing object model to improve the speed of application development...

, a web framework for Java programming
The Echo Protocol
ECHO protocol
The Echo Protocol is a service in the Internet Protocol Suite defined in RFC 862. It was originally proposed for testing and measurement of round-trip times in IP networks....

, an Internet protocol largely superseded by ICMP
A command in programming language
Programming language
A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely....

s to output one or more strings
A discussion forum on FidoNet
FidoNet
FidoNet is a worldwide computer network that is used for communication between bulletin board systems. It was most popular in the early to mid 1990s, prior to the introduction of easy and affordable access to the Internet...

Medicine

ECHO (echocardiography
Echocardiography
An echocardiogram, often referred to in the medical community as a cardiac ECHO or simply an ECHO, is a sonogram of the heart . Also known as a cardiac ultrasound, it uses standard ultrasound techniques to image two-dimensional slices of the heart...

), an imaging technique used to assess heart function in medicine
Echovirus
Echovirus
An ECHO virus, is a type of RNA virus that belongs to the genus Enterovirus of the Picornaviridae family...

, short for "enteric cytopathic human orphan" virus
echo-, involuntary repetition or imitation, as in echolalia
Echolalia
Echolalia is the automatic repetition of vocalizations made by another person. It is closely related to echopraxia, the automatic repetition of movements made by another person....

and echopraxia
Echopraxia
Echopraxia is the involuntary repetition or imitation of the observed movements of another. It is closely related to echolalia, the involuntary repetition of another's speech. The etymology of the term is from Ancient Greek: "ἠχώ from ἠχή " and "πρᾶξις "...

Fiction and mythology

Echo (mythology)
Echo (mythology)
In Greek mythology, Ekho , "echo", itself from ἦχος , "sound") was an Oread who loved her own voice. Zeus loved consorting with beautiful nymphs and visited them on Earth often. Eventually, Zeus's wife, Hera, became suspicious, and came from Mt...

, a nymph
Echo (Marvel Comics), a superheroine in the Marvel universe
Echo (DC Comics)
Echo (DC Comics)
Echo is a name that has been used by a number of different characters in works published by DC Comics.-First Echo:The first Echo was a villain who was an enemy of Lee Travis, the first Crimson Avenger. He debuted in March 1941 in Detective Comics #49....

- a name that has been used by a number of different characters in works published by DC Comics.
- Query and Echo
  Query and Echo
  Query and Echo are fictional characters featured in DC Comics, most commonly known as Riddler's two henchwomen.Query and Echo are well-trained with firearms and boast impressive combat skills. The costumes they wear are catsuit-like clothings with black net stockings and a big question mark logo...
  
  , the team of henchmen for the Riddler that featured the fifth character in DC Comics named "Echo"
Echo (Dollhouse)
Echo (Dollhouse)
Echo is a fictional character portrayed by Eliza Dushku in the Fox science fiction series Dollhouse, created by Joss Whedon. Within the series' narrative, Echo is an "Active" or a "doll", one of a group of men and women who can be programmed with memories and skills to engage in particular...

, the protagonist of science-fiction TV series Dollhouse
Echo (comic book)
Echo (comic book)
Echo is an American comic book independently-published by Terry Moore under his Abstract Studio imprint. The first issue was released on March 5, 2008 with silver foil accents not to be included on future printings....

, a comic book title by Terry Moore, launched in 2008
Echo (1997 film)
Echo (1997 film)
Echo is a 1997 film directed by Charles Correll made for TV starring Jack Wagner and Alexandra Paul. The film was also known as Deadly Echo in Canada and the United Kingdom.-Plot:...

, a 1997 TV film
Echo (2003 film), a 2003 short film directed by Tom Oesch
Echo (2007 film)
Echo (2007 film)
Echo is a Danish film.Awards, 2007 Flanders International FILM Festival – Nominated: Grand Prix...

, a 2007 Danish film
Echo: Secrets of the Lost Cavern
ECHO: Secrets of the Lost Cavern
Echo: Secrets of the Lost Cavern is a computer adventure game released in 2005. It was developed by Kheops Studio and published by The Adventure Company. It is very similar to previous Kheops Studio games; the interface and gameplay are almost identical to Return to Mysterious Island...

, a video game
A race of aliens from the UK TV series Invasion: Earth (TV series)
Invasion: Earth (TV series)
Invasion: Earth is a BBC science fiction TV series. It was made in collaboration with the Sci Fi Channel, and released in 1998 as six fifty minute episodes.-Creation and production:...
Echo Nightray (Anime and Manga) is a female character in the anime and manga Pandora Hearts
Pandora Hearts
is a manga series by Jun Mochizuki. Originally starting serialization in the shōnen magazine GFantasy published by Square Enix in June 2006. Currently fourteen volumes have been released in Japan. The manga series was licensed for an English language release by Broccoli Books but has been dropped;...

Music

Echo (music award)
The Echo (venue)
The Echo (venue)
The Echo is a venue/nightclub located in Echo Park in Los Angeles, California. It also hosted Arthur Magazine's yearly ArthurFest.-Notable performers:*Thao with The Get Down Stay Down*Air Traffic*An Albatross*Autolux*Band Of Horses*Beck...
The Echo Label, a record label
Echo & the Bunnymen
Echo & the Bunnymen
Echo & the Bunnymen are an English post-punk band, formed in Liverpool in 1978. The original line-up consisted of vocalist Ian McCulloch, guitarist Will Sergeant and bass player Les Pattinson, supplemented by a drum machine. By 1980, Pete de Freitas had joined as the band's drummer, and their debut...

, a band
Echo (producer)
Echo (producer)
Paul Irizarry, known artistically as Echo is a Grammy Award-winning Puerto Rican reggaeton producer/songwriter.-Musical career:Echo has worked for the last 10 years with major Latin Hip-Hop & Reggaeton artists, producing beats, recording and mixing songs...

, a reggaeton producer

Albums

Echo (Dave Burrell album)
Echo (Dave Burrell album)
Echo is a studio album released by jazz pianist Dave Burrell. It was recorded on August 13, 1969 and first released as an LP album by BYG Actuel...
Echo (Tom Petty and the Heartbreakers album)
Echo (Leona Lewis album)
Echo (Leona Lewis album)
Echo is the second studio album by British pop/R&B singer and songwriter Leona Lewis. It was released from 9 November 2009 including 16 November 2009 in the United Kingdom, and 17 November 2009 in the United States. Its worldwide release was through Sony Music.Lewis worked with Ryan Tedder, Justin...

Songs

"Echo" (Gorilla Zoe song)
Echo (Gorilla Zoe song)
"Echo" is the third single off rapper Gorilla Zoe's second studio album, Don't Feed Da Animals. Gorilla Zoe uses an autotune effect for this song. The song was released on iTunes March 10, 2009 and was produced by Drumma Boy. The official remix features Diddy and another with Ne-Yo.-Chart positions:...
"Echo" (Trapt song)
Echo (Trapt song)
"Echo" is the third and final single from Trapt's eponymous debut album.-Music video:The video starts with members of the band plugging in their equipment. It then cuts to Chris Taylor Brown and a topless woman, who is lying face down, atop of a bed. The video goes back and forth between Brown and...
"Echo" (Ciara song)
"Echo" (R. Kelly song)
Echo (R. Kelly song)
"Echo" is the third official single from American R&B singer R. Kelly's 2009 album, Untitled.-Chart History:...
"Echo" (Girls Can't Catch song)
Echo (Girls Can't Catch song)
"Echo" is the second and final single by British girl group Girls Can't Catch. It was released on January 18, 2010.- Music video :The music video was shot the week beginning November 9, 2009. Fans were allowed to post video ideas for the music video. Whoever won was allowed to visit the girls on...
"Echo", a song by Cyndi Lauper from the album Bring Ya to the Brink
Bring Ya to the Brink
Bring Ya to the Brink is Cyndi Lauper's tenth studio album and was released on May 27, 2008 in the United States. The song "Set Your Heart" was released as a promo-only single in Japan in early 2008 and "Same Ol' Story" was the first official single released worldwide on May 6, 2008...
"Echo" a song by Bad Meets Evil (Eminem & Royce Da 5'9), from the deluxe edition of Hell: The Sequel
Hell: The Sequel
Hell: The Sequel is the debut extended play by Bad Meets Evil, an American hip hop duo composed of Royce da 5'9" and Eminem. It was released on June 13, 2011 in some countries by Shady Records and Interscope Records and on June 14, 2011 in the United States. The EP focuses on hardcore hip hop and...

album.
"Echo" by Girls' Generation

Newspapers

The Echo (Irish Newspaper)
The Echo (Irish Newspaper)
The Echo is a regional newspaper for parts of Dublin, Ireland. One of the founders and owner of The Echo, David Kennedy launched the newspaper out of the front room of his house, and originally called it The Tallaght Echo, the paper has grown to cover the adjacent suburbs of Clondalkin,...

, based in Dublin, Ireland
Byron Shire Echo
Byron Shire Echo
The Byron Shire Echo is a weekly independent tabloid newspaper which is published in the Byron Shire, New South Wales, Australia.The Echo, as it is also known, was founded in 1986 as a result of marijuana raids by the NSW Police in the surrounding valleys. The paper claimed that the Police were...

, based in Byron Bay, Australia
The Irish Echo
The Irish Echo
The Irish Echo is a weekly newspaper based in New York City. Founded in 1928, it bills itself as "the USA's most widely read Irish-American newspaper" with a readership of 100,000 on circulation of about 60,000...

, based in New York City
Liverpool Echo
Liverpool Echo
The Liverpool Echo is a newspaper published by Trinity Mirror in Liverpool, Merseyside, England. It is published Monday to Saturday, and is Liverpool's evening newspaper while its sister paper, the Liverpool Daily Post, is the morning paper...

, based in Liverpool, England
The Northern Echo
The Northern Echo
The Northern Echo is a leading daily regional morning newspaper, serving the North East of England. The paper is based in Priestgate, Darlington. Its covers national as well as regional news. It is one of the UK's most famous provincial newspaper titles....

, based in Darlington, England
South Wales Echo
South Wales Echo
The South Wales Echo is a daily tabloid newspaper published in Cardiff, Wales and distributed throughout the surrounding area.The newspaper was founded in 1884 and was based in Thomson House, Cardiff city centre. It is published by Media Wales Ltd , part of the Trinity Mirror group...

, based in Cardiff, Wales
Echo Weekly
Echo Weekly
Echo Weekly is an alternative weekly newspaper serving the Kitchener, Waterloo, Cambridge, and Guelph areas in Ontario, Canada. Up until January 2008 Its offices were located in downtown Kitchener but have moved to downtown Guelph....

, based in Kitchener, Ontario
Bournemouth Daily Echo
Bournemouth Daily Echo
The Bournemouth Daily Echo, commonly known as the Daily Echo, is a local newspaper that covers the area of south-east Dorset, England, including the towns of Poole, Bournemouth, Christchurch...

, based in Bournemouth, England
Southern Daily Echo
Southern Daily Echo
The Southern Daily Echo, commonly known as the Daily Echo or simply The Echo, is a local newspaper that covers the area of south-central Hampshire, England, including the city of Southampton...

, based in Hampshire, England

Organizations

ECHO (European Commission)
ECHO (European Commission)
The Humanitarian Aid department of the European Commission , formerly known as the European Community Humanitarian Aid Office, is the European Commission's department for overseas humanitarian aid...

, a department of the European Union
Extended Care Health Option
Extended Care Health Option
The Extended Care Health Option or ECHO is a supplemental coverage program offered by TRICARE to dependents of members of the Uniformed services of the United States with a qualifying disability.-Eligibility:...

, a health coverage program
Echo (radio station), a community radio station in Farnborough, Hampshire
Farnborough, Hampshire
-History:Name changes: Ferneberga ; Farnburghe, Farenberg ; Farnborowe, Fremborough, Fameborough .Tower Hill, Cove: There is substantial evidence...
Echo of Moscow
Echo of Moscow
Echo of Moscow is a Russian radio station based in Moscow, broadcasting in many Russian cities, in some of the former-Soviet republics , and via the Internet, which some observers describe as "the last bastion of free media in Russia"...

, a Russian radio station
ECHO Lake Aquarium and Science Center
ECHO Lake Aquarium and Science Center
ECHO Lake Aquarium and Science Center, formerly the Lake Champlain Basin Science Center, is located on the Burlington waterfront in northern Vermont. It is home to more than 70 species of fish, amphibians, invertebrates, and reptiles, major traveling exhibitions, and the multimedia Awesome Forces...

, an interactive museum and research center in Burlington, Vermont
Burlington, Vermont
Burlington is the largest city in the U.S. state of Vermont and the shire town of Chittenden County. Burlington lies south of the U.S.-Canadian border and some south of Montreal....

Places

United States

Echo, Alabama
Echo, Inyo County, California
Echo, Inyo County, California
Echo is a former settlement in Inyo County, California.It was located on the crest of the Funeral Mountains above Death Valley, halfway between Lee and Schwaub.The site of Echo is within Death Valley National Park.-References:...
Echo, Mendocino County, California
Echo, Mendocino County, California
Echo is a former settlement in Mendocino County, California. It was located south-southeast of Hopland.-References:...
Echo, Minnesota
Echo, Minnesota
Echo is a city in Yellow Medicine County, Minnesota, United States. The population was 278 at the 2010 census.-Geography:According to the United States Census Bureau, the city has a total area of , all of it land.-Demographics:...
Echo, Oregon
Echo, Oregon
Echo is a city in Umatilla County, Oregon, United States. The population was 650 at the 2000 census. It is part of the Pendleton–Hermiston Micropolitan Statistical Area.-History:...
Echo, Utah
Echo, Utah
Echo is a census-designated place located in Summit County, Utah, United States. The population was 56 at the 2010 census. Although Echo has never had a sizable population, the town is historically significant.-History:...
Echo Lake, California
Echo Lake, California
Echo Lake is a small unincorporated community in El Dorado County, California, United States, along U.S. Highway 50 in the mountains of the Sierra Nevada. It is north-northwest of Echo Summit. Echo Lake's nearest neighboring town is Little Norway. The ZIP code is 95721. The community is inside...

, a community
Echo Lake (California)
Echo Lake (California)
Echo Lake, is the name of a glacial lake located in El Dorado County, California, U.S.A. It is about 2 miles off Highway 50 at Echo Summit. The lake is divided into two sections; an Upper lake, and a Lower lake. The elevation of Echo lake is maintained in summer months with a dam at 7,414 feet...

, a lake
Echo Lake, Washington
Echo Lake, Washington
Echo Lake is a census-designated place in Snohomish County, Washington, United States. The population was 849 at the 2000 census.-Geography:Echo Lake is located at ....

, a community
Echo Mountain Park
Echo Mountain Park
Echo Mountain is a ski and snowboard area located in Clear Creek County, west of Evergreen, Colorado. As of the 2008–2009 season, it claims to be the “Denver's Closest, Cheapest and Freshest Ski and Ride Area.”-Description:...

, a ski area in Colorado
Echo Summit
Echo Summit
Echo Summit is a mountain pass located in eastern El Dorado County, California, USA. At an elevation of , it is the highest point on U.S...

, a mountain pass in California
Echo Township, Michigan
Echo Township, Michigan
Echo Township is a civil township of Antrim County in the U.S. state of Michigan. As of the 2000 census, the township population was 928.- Communities :Pleasant Valley is an unincorporated community in the township at .-Geography:...
Echo Township, Yellow Medicine County, Minnesota

Spain

Echo, Aragón, Spain, a village

Vessels

Echo (steam tug)
Echo (steam tug)
The steam tug Echo operated in the early 1900s on Puget Sound.-Construction:Echo was built at Tacoma in 1906 by Crawford and Reid for Captain O. G. Olson...

, a steam tug on Puget Sound
Echo class submarine
Echo class submarine
The Echo class submarines were nuclear cruise missile submarines of the Soviet Navy built during the 1960s. Their Soviet designation was Project 659 class for the first five vessels, and Project 675 for the following twenty-nine...

, a Soviet era navy submarine
Echo class survey ship (disambiguation), two classes of Royal Navy survey ship
USS Echo (IX-95)
USS Echo (IX-95)
USS Echo , an unclassified miscellaneous vessel, was the only ship of the United States Navy to be named for the nymph Echo. A sailing scow, she was used as a supply ship in the South Pacific from 1942 to 1944.- History :...

, a US Army supply ship from New Zealand (WW II)

Other uses

Echo Incorporated, a manufacturer of chainsaws, trimmers and other small-engine machines.
Echo Johnson, a model and actress
60 Echo
60 Echo
60 Echo is a quite large main-belt S-type asteroid. It was discovered by James Ferguson of the United States Naval Observatory in Washington D.C., on September 14, 1860. It was his third and final asteroid discovery. It is named after Echo, a nymph in Greek mythology.-References:...

, an asteroid
Toyota Echo, a car
Echo smartpen, a ballpoint pen, computer, and audio recorder manufactured by Livescribe
Livescribe
The Livescribe paper-based computing platform consists of a digital pen, digital paper, software applications, and developer tools.Central to the Livescribe platform is the smartpen, a ballpoint pen with an embedded computer and digital audio recorder...
A letter in the NATO phonetic alphabet
The title of a poem by Christina Rossetti
Christina Rossetti
Christina Georgina Rossetti was an English poet who wrote a variety of romantic, devotional, and children's poems...
An old-fashioned South Australia
South Australia
South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

n term for "bottle".
Echo, a famous matriarch elephant in the Amboseli National Park
Echo (genus)
Echo (genus)
Echo is a genus of damselflies belonging to the family Calopterygidae.The genus contains the following species:*Echo margarita *Echo maxima *Echo modesta *Echo uniformis...

, a genus of damselfly
Kyocera Echo
Kyocera Echo
The Kyocera Echo is a smartphone manufactured by Kyocera International of Japan, and distributed by Sprint in the United States. It runs the Google Android operating system. It was announced by Sprint on 7 February 2011, and released for sale 17 April 2011.It is unusual in having two 3.5" screens...

, a dual screen smart phone