File anechoic chamber.jpg thumb 200px An anechoicchamber An anechoicchamber an echoic or non echoing ... reflected back. Common anechoicchamber experiments include measuring the transfer function of a loudspeaker ... of an anechoicchamber is very quiet, with typical noise levels in the 10&ndash 20 Decibel dBA range ... designed anechoicchamber is The quietest place on earth measured at &minus 9.4 dBA. ref http www.tcbmag.com ... vibration or electromagnetic signals. A recording studio may utilize a semi anechoicchamber to produce ... File Radio frequency anechoicchamber HDR 0a.jpg thumb right An RF anechoicchamber. The internal appearance of the radio frequency RF anechoicchamber is sometimes similar to that of an acoustic anechoicchamber, however, the interior surfaces of the RF anechoicchamber are covered with radar absorbent ... absorbers.htm . The RF anechoicchamber is typically used to house the equipment for performing ... exhibit some of the properties of an acoustic anechoicchamber, such as attenuation of sound and shielding ... material. To work effectively, all internal surfaces of the anechoicchamber must be entirely covered ... over frequency File Anechoicchamber wall.JPG thumb 200px Close up of a pyramidal RAM Waves of higher ... quality of an RF anechoicchamber is determined by its lowest test frequency of operation ... An RF anechoicchamber is usually built into a screened room, designed using the Faraday cage principle. This is because most of the RF tests that require an anechoicchamber to minimize reflections ... RF anechoicchamber is not justifiable unless it is likely to be used continuously or perhaps rented ... electrical power supplies for use within the anechoicchamber as unfiltered supplies present a risk ... risks associated with RF anechoicchamber The following occupational safety and health health ... of an acoustic anechoicchamber http www.ets lindgren.com manuals anechoic chambers lawrence.pdf ... AnechoicChamber.html Bell Labs Murray Hill anechoicchamber cite web url http web.archive.org ... more details
NOTOC File HMS Triumph 1 crop.jpg thumb 325px Anechoic tiles on the hull of HMS Triumph S93 HMS Triumph . Two patches of missing tiles are visible towards the forward edge of the fin. Anechoic tiles are rubber or synthetic polymer tiles containing thousands of tiny voids, applied to the outer hulls of military ships and submarine s, as well as anechoicchamber s. Their function is twofold To absorb the sound waves of Sonar Active sonar active sonar , reducing and distorting the return signal, thereby reducing its effective range. To attenuate the sounds emitted from the vessel, typically its engines, to reduce the range at which it can be detected by Sonar Passive sonar passive sonar . Development by Nazi Germany The technology of anechoic tiles was developed by Nazi Germany in the Second World War . Codenamed Alberich after Alberich the invisible sorcerer from Germanic Mythology , it was a convert 4 mm in sig 1 adj on thick coating of rubber for submarines that attenuated sound in the 10 to 18 kHz range to 15 of its normal strength. This frequency range matched the operating range of the early ASDIC active sonar used by the allies. ASDICs operating range would have been correspondingly reduced from its optimal range of 2000 meters to somewhere around 300 meters. The rubber contained a series of small voids, which helped to break up sound waves. There were problems with this technology the material performed differently at different depths, due to the voids being compressed by water pressure, and securing the tiles to the submarine required a special adhesive and careful application. The first tests were conducted in 1940, but it was not operational until 1944, when it was successfully ... associated with machinery at that location inside the hull. The Royal Navy started using anechoic ... Navy started using anechoic tiles in the mid 1980s, with the Los Angeles class submarine improved ... Navy Collins class submarine are covered in a skin of anechoic tiles to minimise detection by sonar ... more details
Benefield Anechoic Facility BAF supports installed systems testing for avionics test programs requiring a large, shielded chamber with radio frequency RF absorption capability that simulates free space. This facility is located at the southwest side of the Edwards Air Force Base main base. It is currently the world s largest anechoicchamber. ref Audio Junkies, August 22, 2007 http www.audiojunkies.com blog 503 the worlds largest anechoicchamber ref The facility is named after Rockwell International Rockwell test pilot and flight commander Tommie Douglas Doug Benefield who was killed in a crash 22 miles northeast of Edwards Air Force Base in the desert east of Boron on August 29, 1984 during a USAF B 1 Lancer flight test . ref NASA, Dryden Flight Research Center, July 31, 2008 http www.nasa.gov centers dryden news X Press safety lessons spotlight.html ref ref City of Lancaster 2002 Honorees http www.cityoflancasterca.org index.aspx?page 198 ref ref Ejection History.org http www.ejection history.org.uk Aircraft by Type b 1 lancer.htm ref Purpose The BAF is a ground test facility to investigate and evaluate anomalies associated with EW systems, avionics, tactical missiles and their host platforms. Tactical sized, single or multiple, or large vehicles can be operated in a controlled Electromagnetic radiation electromagnetic EM environment with emitters on and sensors stimulated while RF signals are recorded and analyzed. The largest platforms tested at the BAF have been the B 52 and C 17 aircraft. The BAF supports testing of other types of systems such as spacecraft, tanks, satellites, air defense systems, drones and armored vehicles. The BAF equipment generates RF signals with a wide variety of characteristics, simulating red blue gray unfriendly friendly unknown surface based, sea based, and airborne systems. With the combination of signals and control functions available, a wide variety of test conditions can be emulated. Many conditions that are not available on outdoor ... more details
The Chamber may refer to The Chamber novel The Chamber novel , by John Grisham The Chamber film The Chamber film The Chamber game show The Chamber game show Disambig ... more details
wiktionary chamberChamber may refer to Chamber comics , a Marvel Comics superhero associated with the X Men Chamber firearms , the portion of the barrel or firing cylinder in which the cartridge is inserted prior to being fired Chambers law , the rooms used by a barrister or to an association of barristers A room inside a building Great Chamber , the second most important room in a medieval or Tudor English castle, palace, mansion or manor house Chambar , a town in Pakistan also spelt Chamber Environment chamber used in testing It may also refer to Chambers of commerce , a business network with local, regional, national, international and bi lateral Chambers List of employer associations and other business organizations Chambers of parliament , in politics Chamber music , a form of classical music, written for a small group of instruments which traditionally could be accommodated in a palace chamber Combustion chamber , part of an engine in which fuel is burned The Chamber may also refer to The Chamber game show , a short lived game show on FOX The Chamber novel The Chamber novel , a suspense novel by John Grisham The Chamber film The Chamber film , based on the novel See also lookfrom Chamber disambig de Kammer es C mara eo Kamero fr Chambre gl C mara it Camera nl Kamer pt C mara ru uk ... more details
orphan date April 2010 Infobox Album See Wikipedia WikiProject Albums Name In a Chamber Type Album Artist Wire Train Cover Album wire train chamber.jpg Released 1984 Label Columbia Records Columbia 415 Records 415 Producer David Kahne In a Chamber is Wire Train s first full length album, released in 1984. U2 s Bono claimed it to be his personal favorite album of that year. ref name wire train bio cite web url http www.wiretrain.co.uk wtbiog.htm title Wire Train Biography accessdate 2008 04 30 ref Track listing I ll Do You Everything s Turning Up Down Again Never Like I Forget It All When I See You Chamber Of Hellos Slow Down She s On Fire I Gotta Go Love Against Me References reflist Category 1984 albums Category Albums produced by David Kahne Category Debut albums Category 415 Records albums newwave album stub ... more details
Unreferenced date December 2009 Orphan date December 2009 The term reverberation Chamber is used in acoustics as well as in electrodynamics . Reverberation room s or echo chamber s are used for sound applications. Electromagnetic reverberation chamber s are used for electromagnetic compatibility testing and related Electromagnetism electromagnetic applications. See also Anechoicchamber Category Acoustics Category Electromagnetic radiation ... more details
insulated to exclude external noises and they were internally Anechoicchamberanechoic that is, they were ... chamber for scientific measurement Acoustics Anechoicchamber Telephone game R.G. Keen The Technology ...for metaphorical echo chambers in media Echo chamber media Refimprove date March 2008 image Hallraum TU Dresden 2009 06 21.jpg thumb right Echo chamber of the Dresden University of Technology image Hamilton Mausoleum Interior.jpg thumb right Hamilton Mausoleum has a spectacularly long lasting unplanned echo An echo chamber is a hollow enclosure used to produce Echo phenomenon echoing sounds, usually for recording purposes. For example, the producers of a television or radio program might wish to produce the aural illusion that a conversation is taking place in a cave this effect might be accomplished by playing the recording of the conversation inside an echo chamber, with an accompanying microphone to catch the echoes. In music, the use of acoustic Echo phenomenon echo and reverberation effects ... of electrical and physical methods. Acoustically speaking, the classic novel echo chamber ... degree of accuracy. Producing echo and reverberation in this form of echo chamber is remarkably ... fidelity loudspeaker located at one end of the echo chamber. One or more microphones are placed ... off the walls of the chamber. The farther away from the speaker, the more echo and reverberation ... from all three microphones, giving Bowie s voice a strikingly reverberant sound. The original echo chamber ... electro acoustic echo chamber. Buildings such as churches, church halls and ballrooms have often ... Road chamber, so enterprising producers and engineers often made use of any large reverberant ... chamber effect by processing the signal digitally. Because digital devices are able to simulate ... index.php?title Echo chamber title SourceWatch entry on media Echo Chamber effect date 2006 10 22 work SourceWatch Bathroom singing References reflist DEFAULTSORT Echo Chamber Category ... more details
Single chamber may refer to Single chamber government , a government having only one legislative or parliamentary chamber Single chamber pacemaker , a pacemaker in which only one pacing lead is placed into a chamber of the heart disambig ... more details
There are at several political assemblies known as the Chamber of Representatives . Each one forms the lower house of a bicameralism bicameral legislature . Chambre des repr sentants de France French Chamber of Representatives , the lower body of the French Parliament during the Hundred Days Chamber of Representatives of Belarus Chamber of Representatives of Belgium Chamber of Representatives of Colombia Chamber of Representatives of Morocco Chamber of Representatives of Uruguay disambig ... more details
A Chamber of Corporations is a key element in the idea of corporatism and could mean either The Chamber of Fasci and Corporations was the lower chamber of the bicameral legislature of Italy between 1939 and 1943, replacing the popularly elected Chamber of Deputies . In Portugal during the Estado Novo Portugal Estado Novo regime, the upper chamber was dubbed Chamber of Corporations Portugal Chamber of Corporations . disambig ... more details
Disambig Rescue Chamber can refer to McCann Rescue Chamber , a device for rescuing submariners from a submarine that is unable to surface Mine Rescue Chamber , an emergency shelter installed in underground environments. ... more details
A Steam chamber is an enclosed space containing steam. Relevant articles include Steam chamber holocaust claim Steambath Steam room disambig ... more details
Unreferenced stub auto yes date December 2009 Image Nautilus pompilius.jpg thumb Nautilus pompilius The body chamber , also called the living chamber , is the outermost or last chamber in the Animal shell shell of a nautiloid or Ammonoidea ammonoid cephalopod . The body of the animal occupies the living chamber, apart from the siphuncle which extends through the rest of Septa biology septa the phragmocone to provide buoyancy . DEFAULTSORT Body Chamber Category Cephalopod zootomy Nautiloidea stub Ammonite stub ... more details
Unreferenced date November 2006 A chamber choir or group of chamber singers is the Choir choral equivalent of a chamber Musical ensemble ensemble , using voices instead of instruments. This prestigious choir will usually consist of 20 40 elite and dedicated singers. Several chamber choir formats exist, ranging from Barbershop music barbershop groups to exclusively female arrangements. DEFAULTSORT Chamber Choir Category Choirs Band stub de Kammerchor es Coro de c mara nl Kamerkoor no Kammerkor fi Kamarikuoro sv Kammark r ... more details
unreferenced date October 2009 The vitreous chamber or postremal chamber occupies posterior 4 5ths of the human eyeball eyeball . This chamber of consists of the space between the lens and the retina, and is filled with a transparent gel called the vitreous humor . References reflist Eye Category Eye anatomy stub ... more details
orphan date June 2010 A chamber ballet is a chamber music performance or work that features one or more ballet dancers. Examples are a chamber music composition with the addition of dancers, or a full scale ballet performed using a smaller ensemble. Ballet Category Ballet dance stub ... more details
Unreferenced stub auto yes date December 2009 A resonance chamber uses resonance to amplify sound . The chamber has interior surfaces which reflect an acoustics acoustic wave. When a wave enters the chamber, it bounces back and forth within the chamber with low loss See standing wave . As more wave energy enters the chamber, it combines with and reinforces the standing wave, increasing its Amplitude intensity . See also Cavity resonator electrical version Resonance Sounding box Waveguide DEFAULTSORT Resonance Chamber Category Acoustics Sci stub ru ... more details
Image Wen Yuan Chamber.JPG thumb right 300px Wenyuan Chamber Imperial Library The Wenyuan Chamber zh s t p W nyu n G , an imperial library of the Qing Dynasty in the Forbidden City in Beijing , was built in 1776 . It stores numerous works, including the Sikuquanshu . The architecture style of Wenyuan Chamber was based on the renowned Tianyi Chamber in Ningbo . Wenjin Chamber in the Mountain Resort is another remaining imperial library of the Qing Dynasty. At present, the Wenyuan Chamber is not open to the public. See also Tianyi Chamber Wenjin Chamber Library stub PRC struct stub coord missing Beijing Category Forbidden City Category Buildings and structures in Beijing Category Qing Dynasty Category Libraries in China zh ... more details
A Cardiac chamber may refer to either Atrium heart Ventricle heart The direct translation of cardiac chamber to Swedish refers specifically to cardiac ventricle . disambig uk ... more details
Infobox TV channel name Chamber TV logofile logosize logoalt logo2 launch 4 December 2001 closed date picture format share share as of share source network owner slogan country Luxembourg language French language French and Luxembourgish language Luxembourgish broadcast area affiliates headquarters former names replaced names replaced by names sister names timeshift names web http www.chd.lu fr web TV default.jsp www.chd.lu terr serv 1 terr chan 1 sat serv 1 sat chan 1 cable serv 1 cable chan 1 sat radio serv 1 sat radio chan 1 adsl serv 1 adsl chan 1 online serv 1 online chan 1 3gmobile serv 1 Chamber TV is a Luxembourg ian television channel that broadcasts coverage of the activities of the national legislature, the Chamber of Deputies of Luxembourg Chamber of Deputies . It is available cable television by cable and satellite television by satellite . It is owned and managed by the Chamber of Deputies, under the direction of the President of the Chamber of Deputies President of the Chamber currently Laurent Mosar Parliamentary broadcasters Category Legislature broadcasters Category Luxembourg television networks Luxembourg stub europe tv station stub de Chamber TV fr Chamber TV lb Chamber TV nl Chamber TV ... more details
File Tian Yi Chamber.JPG thumb right 200px Tianyi Chamber The Tianyi Chamber , located in Ningbo city, is the oldest existing library in China. Founded in 1561 during the Ming Dynasty, in its heydays, it boasted a collection of 70,000 volume of antique books. During the Qing Dynasty, Emperor Qianlong visited Tianyi Chamber, he ordered officials to draw schematics of Tianyi Chamber s building plan and book cases as prototype to build several imperial libraries including Wenyuan Chamber in the Forbidden City, Wenjin Chamber in the Mountain Resort to house the Siku Quanshu encyclopedia. After the Opium War , the British army pirated many history and geography collections from Tianyi Chamber, followed by thefts from local thieves by 1940, the collection dwindled to less than 20,000 volumes. After the founding of PRC, due to government effort and donation by privated collectors, the collection now recovered some what to about 30,000 volumes, mostly rare antique Ming dynasty printed and hand copied volumes. In 1982 , Tianyi Chamber was established by the Chinese authorities as a National Heritage Site. Located near the library is the Qin Family Drama Stage, which is not part of the library, but it is part of the Tianyi Chamber complex. Gallery gallery Image Tian Yi Chamber Library.jpg Tianyi Chamber library File Zunjing Chamber.JPG The Zunjing Hall located within the Tianyi Chamber Image Fan Qin.JPG Statue of Fan Qin, the founder of the chamber Image Ming Dynasty wood carving books in Tian Yi Chamber colllection.JPG Ming dynasty antique books in Tianyi Chamber collection Image Tian Yi Chamber book case.JPG Tianyi Chamber book case Image Qinshi xilou.jpg Qin family Drama Stage Image Majiong museum.JPG Majiong Museum display Image Wen Yuan Chamber.JPG Wenyuan Chamber Imperial Library in the Forbidden City, modeled after the Tianyi Chamber gallery See also Wenyuan Chamber Wenjin Chamber coord missing Zhejiang Category Libraries in China Category Ningbo de Tianyige Bibliothek ... more details
Image Api Chamber.png right Api Chamber is a chamber in Whiterock Cave in Gunung Api, Gunung Mulu National Park , Sarawak , Malaysia . Measuring 300m x 200m and with a surveyed circumference of 900m it is the ninth largest cave chamber by area in the world. Its height is over 100m and its plan area is 58,000 square metres. It is the second largest chamber in Malaysia, after Sarawak chamber . It was discovered during the Benarat 2005 Expedition Benarat 2005 Caving Expedition by Dave Nixon and Mark Brown. External links http www.daveclucas.com Benarat2005 Pages Api.html Benarat 2005 Caving Expedition coord missing Malaysia Category Caves of Malaysia Sarawak geo stub ... more details
Unreferenced date December 2009 A float chamber is a device for automatically regulating the supply of a liquid to a system. It is most typically found in the carburettor of a normally aspirated internal combustion engine , where it automatically meters the fuel supply to the engine. However, this arrangement is found in many automatic liquid systems, for example the cistern of a toilet could be said to be a type of float chamber. A float chamber works by allowing liquid within the chamber to lift a float which is linked to a valve which regulates the liquid intake. When the level is low, the float drops and opens the valve, allowing in liquid until the float rises sufficiently to close off the valve again. This is identical in principle to the ballcock valve. One drawback of the basic type of float chamber described is that it only operates correctly when it is the right way up, so more sophisticated solutions are needed in aircraft . DEFAULTSORT Float Chamber Category Engine fuel system technology de Schwimmerkammer ... more details
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