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Topic: Cockpit voice recorder

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	NTSB - CVR & FDR (Site not responding. Last check: 2007-10-22)
		Both recorders are installed in the most crash survivable part of the aircraft, usually the tail section.
		The recorder's "cockpit area microphone" is usually located on the overhead instrument panel between the two pilots.
		A CVR committee usually consisting of members from the NTSB, FAA, operator of the aircraft, manufacturer of the airplane, manufacturer of the engines, and the pilots union, is formed to listen to the recording.
	www.ntsb.gov /aviation/CVR_FDR.htm (835 words)

	SR 111 Investigation Report-2.2.2 Cockpit Voice Recorder
		The 30-minute cockpit voice recorder (CVR) recording on SR 111 was insufficient to provide the amount of data needed to fully analyze all of the factors that may have played a part in the occurrence or that could have led to the identification of further safety deficiencies.
		Powering the recorders from separate buses, with some separation of the wiring and separation of respective circuit breakers (CB), would provide an opportunity for one recorder to remain powered in the event of the loss of a bus, and therefore, improve the likelihood that additional useful information would be recorded.
		Some portions of the recording from the cockpit area microphone channel of the CVR that were potentially important to the investigation were difficult to decipher.
	www.bst.gc.ca /en/reports/air/1998/a98h0003/01report/02analysis/rep2_02_02.asp?print_view=1 (434 words)

	PilotsCom; CVR
		Cockpit Voice Recorders, often known as CVRs, are required equipment in all commercial aircraft operating throughout the world.
		These devices record conversations throughout an aircraft's cockpit on (in older models) digital tape and (in newer models) on a digital microchip.
		This is NOT the Cockpit Voice Recording from the 727, but rather the ATC tapes taken from SAN Tracon and Tower the day of the accident.
	www.geocities.com /pilotsmovie/cvr/cvr.html (1169 words)

	Flight data recorder -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-22)
		The flight data recorder (FDR) refers generically to a class of recorders used to record specific (A vehicle that can fly) aircraft peformance parameters.
		Currently, EUROCAE specifies that a recorder must be able to withstand a 3400 (The 7th letter of the Roman alphabet) g impact shock for 6.5 (One thousandth of a second) milliseconds.
		They record significant (An instance of traveling by air) flight parameters, including the control and (A mechanism that puts something into automatic action) actuator positions, engine information and time of day.
	www.absoluteastronomy.com /encyclopedia/f/fl/flight_data_recorder.htm (614 words)

	ABC News: EgyptAir 990 Cockpit Voice Recorder Transcript
		This type of recording is usually caused by cockpit noise that obscures portions of the voice signals or by a minor electrical or mechanical failure of the CVR system that distorts or obscures the audio information.
		This type of recording is usually caused by a combination of a high cockpit noise level with a low voice signal (poor signal-to-noise ratio) or by a mechanical or electrical failure of the CVR system that severely distorts or obscures the audio information.
		Washington, D.C. The undersigned Cockpit Voice Recorder group members have reviewed the CVR tape recording from EgyptAir Airlines, Inc. Flight 990 that crashed on October 31, 1999 near Nantucket Island, MA, and have participated in the preparation of both an Arabic language transcript and an English language translation of that transcript.
	abcnews.go.com /US/story?id=96190&page=1 (1658 words)

	Will black box reveal Flight 93's last moments?
		While built to withstand tremendous crash forces and intense heat, neither the cockpit voice recorder nor its twin, the flight data recorder, is indestructible.
		The cockpit voice recorder picks up conversation in the plane's cockpit through a microphone located on the overhead instrument panel and boom mikes worn on pilots' headsets.
		Also in the tail section is the flight data recorder, which monitors airplane functions such as speed, heading, altitude and the position of directional surfaces such as the rudder, elevators and flaps.
	www.post-gazette.com /headlines/20010914blackbox0914p3.asp (587 words)

	Black Death - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-10-22)
		The initial 14th century event was called the "Great Mortality" by contemporary writers, and, with later outbreaks, became known as the "Black" Death because of a striking symptom of the disease in which sufferers' skin would flen due to subdermal hemorrhages.
		Historical records attribute the Black Death to an outbreak of bubonic plague, an epidemic of the bacterium Yersinia pestis spread by fleas with the help of animals like the fl rat (Rattus rattus), although today's experts debate both the microbiological culprit and mode of transmission.
		Chinese accounts record that the disease spread throughout the Mongol and Chinese empires, eventually killing two thirds of China's population.
	encyclopedia.worldsearch.com /black_death.htm (3482 words)

	Flight 93 black box under wraps
		She said there had been a persistent rumor that one of the hijackers had gotten into the cockpit at the beginning of the flight by posing as a pilot and asking to sit in the jump seat behind the pilot and first officer.
		The cockpit voice recorder is a rectangular device encased in durable metal that is placed in the tail section of every commercial airplane.
		News leaks indicate that the recorder had captured a chaotic blend of scuffling, screams and voices speaking in English and Arabic in the plane's final moments, but that federal authorities are unsure exactly what information they have.
	www.post-gazette.com /headlines/20011104blackbox1104p2.asp (941 words)

	Acoustical Society of America - Aircraft Damage Detection From Acoustic Signals Found By A Cockpit Voice Recorder*
		Signal analysis of data acquired from the CVR (cockpit voice recorder) revealed the presence of structural acoustic signals that indicated the failure onset and the resulting aircraft breakup.
		When the CVR was replayed at constant speed, the recorded vibration components were transformed into time- and frequency-domain modulations of carrier tones that were being delivered to the tape heads.
		The presence of signals recorded on the silent track is likely a result of the triboelectric effect acting on a vibrating signal line without a microphone but still connected to the CVR input amplifiers.
	www.acoustics.org /2psa1.html (1358 words)

	Parlementaire Enquête Bijlmerramp : eindrapport : 3.19 hangar 8, gezocht: de cockpit voice recorder (Site not responding. Last check: 2007-10-22)
		Daarom heeft de vooronderzoeker besloten, omdat wij wisten dat een groot aantal vliegtuigwrakdelen was getransporteerd naar de vuilstortplaatsen in Zeeburg en Nauerna, om daar een zoekactie in te stellen naar de voice recorder en naar bepaalde mogelijk essentiële vliegtuigonderdelen, zoals besturing en motorophanging.
		Het essentiële binnenwerk was lichter beschadigd maar nog steeds bruikbaar.
		Het is mogelijk dat de CVR is meegenomen op de rampplek op 4 oktober 1992 of in de dagen daarna uit de Hangar 8.
	www.nrc.nl /W2/Lab/Enquete/Rapport/h3_p19.html (2930 words)

	Alaska Airlines cockpit voice recorder recovered - Napoli, Kaiser & Bern - Attorneys (Site not responding. Last check: 2007-10-22)
		The cockpit voice recorder is said to be in good shape, and the NTSB is hopeful that it will provide vital clues into why the jet went down.
		Both recorders, known as ``fl boxes'' although they are a bright orange in color, are designed to send out a beacon signal or ``ping'' as soon as they are immersed in water.
		The recovery of the voice recorder came just hours after U.S. Coast Guard officials, overriding protests from families of the missing, called off its search for survivors, saying none of the 88 people could still be alive in the cold waters off the California coast north of Los Angeles.
	www.nblawfirm.com /article82.cfm (973 words)

	Voice recorder of Cypriot airliner found-Greek TV - Boston.com (Site not responding. Last check: 2007-10-22)
		Searchers have found the cockpit voice recorder of a crashed Cypriot airliner in which 121 people died, Greece's state-run television reported.
		ATHENS (Reuters) - Searchers have found the cockpit voice recorder of a crashed Cypriot airliner in which 121 people died, Greece's state-run television reported.
		Investigators want to listen to the recorder's monitoring of cockpit conversations to shed light on why both the pilot and co-pilot, as well as many passengers, appear to have lost consciousness during what was meant to be only a 90-minute flight.
	www.boston.com /news/world/europe/articles/2005/08/19/voice_recorder_of_cypriot_airliner_found_greek_tv?mode=PF (197 words)

	cockpit voice recorder (Site not responding. Last check: 2007-10-22)
		When you're trying to find top-quality advice about cockpit voice recorder, it will be easier said than done unscrambling quality advice from unprofessional cockpit voice recorder suggestions or help so it is important to recognize ways of judging the information you are offered.
		A good hint to follow when you are presented with help or advice about a cockpit voice recorder website is to research who is behind the website.
		Doing this could reveal the owners cockpit voice recorder credibility The quickest way to work out who owns the cockpit voice recorder site is to find the 'about' page.
	www.underwriting-news.info /voice-recorder/cockpit-voice-recorder.htm (223 words)

	Atlas Aviation - Cockpit Voice Recorders
		This committee creates a written transcript of the tape to be used during the investigation.
		Due to the highly sensitive nature of the verbal communications inside the cockpit, Congress has required that the Safety Board not release any part of a CVR tape recording.
		Because of this sensitivity, a high degree of security is provided for the CVR tape and its transcript.
	www.atlasaviation.com /CVR/about_cockpit_voice_recorders.htm (808 words)

	THE POST, Ohio University, Athens, Ohio
		After a two-week search, the recorder was found Saturday night by a remote-operated robot, and yesterday it was delivered to National Transportation Safety Board headquarters in Washington.
		NTSB Chairman James Hall said scientists would begin analyzing the recorder immediately to see if its tape was damaged by the destruction of the plane or by its lengthy submersion at a depth of 250 feet.
		Preliminary data from the plane’s flight data recorder showed that the Boeing 767’s autopilot was switched off, and the plane was put into a dive so steep and fast that passengers would briefly have felt weightless.
	thepost.baker.ohiou.edu /archives2/111599/brief05.html (306 words)

	EgyptAir investigation centered on recordings (Site not responding. Last check: 2007-10-22)
		Hall said work on the plane's other ''fl box,'' the cockpit voice recorder, was being slowed because of the need to translate the recorded conversations to English from the pilots' native Arabic.
		The voice recorder was recovered from the ocean floor late Saturday just ahead of worsening weather.
		Hall said Monday that investigators were working to synchronize the cockpit voice and flight data recorder information to show any connection between problems and the crew's reactions.
	www.eagletribune.com /news/stories/19991116/FP_001.htm (934 words)

	'The Real Story of Flight 93'
		Investigators think the voice belonged to Ziad Samir Jarrah, the lead man, and that he had flipped the wrong switch, thinking he was addressing the passengers over the P.A. system when he was calling Cleveland control instead.
		On the cockpit voice recorder (CVR), sources tell Newsweek, Arab voices can be heard realizing their mistake.
		The CVR picks up numerous clicks and snaps as the hijackers fiddled with switches and knobs, trying to make sure they are no longer on the open airwaves.
	billstclair.com /911timeline/2001/newsweek112501.html (1165 words)

	Joint ALPA-SA and CAA Statement on Indiscriminate Use of Cockpit Voice Recorder Data (Site not responding. Last check: 2007-10-22)
		The intent and usage of the CVR are clearly defined, in international terms, in the International Civil Aviation Organisation (ICAO) policy, to provide accident investigators with a means of establishing the sequence of events, that occurred in a sophistic ated technical cockpit environment, immediately preceding an accident.
		Without the formal agreement and acceptance by flight deck crews to have their conversations recorded, there would be no cockpit voice recorders in existence today, and without the availability of this data to accident investigation teams, airline aviation safety would, most certainly, not have improved to its current level.
		Notwithstanding the public interest value in the Helderberg crash, the processing and interpretation of the CVR should remain the responsibility of the relevant accident investigation organisation The publication of the un-authenticated "Helderberg" CVR tr anscript is nothing but an irresponsible insensitive and sensationalistic ploy to increase newspaper circulation.
	www.caa.co.za /press_files/2000/pr0526.html (521 words)

	Audio Capture - Save any audio to the MP3 format. (Site not responding. Last check: 2007-10-22)
		The Audio Record Wizard is a software program designed to record audio from any source.
		The only recording limit is the size of your hard drive.
		Recording in the MP3 format makes it easy to send your files via email because of its compressed size.
	www.recordaudio.net (224 words)

	Navy Recovers Cockpit Voice Recorder From EgyptAir Flight 990 [Free Republic] (Site not responding. Last check: 2007-10-22)
		The cockpit voice recorder, which was bent on one side, was found not far from where investigators detected a signal from its pinger, which had come detached.
		The flight data recorder, retrieved on Tuesday, and the cockpit voice recorder could tell investigators what doomed the Boeing 767, which crashed in the ocean off the Massachusetts island of Nantucket, killing all 217 people aboard.
		Well if it's like the data recorder the internal components will be encased in a shock-casing and on the inside of that will be a label with the flight # on it.
	www.freerepublic.com /forum/a382e83e06a1b.htm (1076 words)

	The cockpit voice recorder... (Part 2)
		The pilot announces to the passengers and crew that she will be attempting to make an emergency landing and that it will be very rough.
		I don't think that leaving her a recording to obsess over for years is the nicest thing I could do for her.
		However, there is nothing in a pocket cassette recorder that even the most paranoid flight attendant could get worried about.
	www.surveycentral.org /?x=x&V=2991&ReSort=1 (1026 words)

	Cockpit Voice Recorder (Site not responding. Last check: 2007-10-22)
		After a Mainland Chinese owned B767 crash,(at night) the cockpit voice recorder tape was listened to by Boeing Engineers involved in the accident investigation.
		The cockpit crew's voices on the tape were speaking in Chinese, but in the background a "synthetic" voice warning (in English) could be heard going off prior and up to the point of impact with the ground.
		A translator was bought in and after listening to the tape advised that the cockpit crew were engaged in an argument.
	propliners.com /eve/ubb.x/a/tpc/f/3126029032/m/3666068383/xsl/print_topic (181 words)

	CNN - Divers recover Swissair 111's cockpit voice recorder - September 11, 1998
		HALIFAX, Nova Scotia (CNN) -- Searchers recovered Swissair 111's cockpit voice recorder from the waters of the North Atlantic Friday night, which could shed new light on the doomed jet's last moments.
		The cockpit voice recorder was found 180 feet (55 meters) below the ocean surface, near where the data recorder was found, transportation officials said.
		Although investigators already have a transcript of the conversation between the Swissair pilots and air controllers, the voice recorder may have picked up additional conversation between the two pilots, or irregular noises in the aircraft.
	www.cnn.com /WORLD/americas/9809/11/swissair.crash.02 (583 words)

	SIGHTINGS
		The recovery of the cockpit voice recorder and the final few seconds on the fl-box data recorder may shed some light on puzzling information received so far, such as the shutdown of the plane's two engines during the rapid descent.
		Investigators had been counting on information from the cockpit voice recorder, recovered late Saturday by the navy's underwater robot Deep Drone, to explain what happened.
		Investigators have refused to speculate about what might have happened, saying that the cockpit voice recorder was needed before they could draw any conclusions.
	www.rense.com /politics5/990strug.htm (491 words)

	CBC News: Cockpit voice recorder found, could prove heroics (Site not responding. Last check: 2007-10-22)
		SOMERSET, PA. - The cockpit voice recorder for United Flight 93 was found late Friday, offering possible evidence that passengers on board struggled with hijackers before it crashed in an isolated Pennsylvania field.
		Designed to record the last 30 minutes of conversation inside the cockpit, the recorder could add credence to reports that passengers on board struggled with the hijackers, preventing them from reaching whatever their intended target might have been.
		The cockpit voice recorder is thought to be damaged too badly to contain any useful information, but the flight data recorder could still be useful.
	www.cbc.ca /cgi-bin/templates/view.cgi?/news/2001/09/15/blackboxes010915 (359 words)

	Swissair cockpit voice recorder found
		HALIFAX, Sept 12: Navy divers have recovered the cockpit voice recorder from Swissair flight 111 that crashed into the Atlantic Ocean on September 2, killing all 229 people on board, the Canadian Navy said.
		Investigators said they hope the voice recorder will shed light on the flight's last six minutes, which is missing from the flight data recorder recovered last week.
		The flight data recorder is being studied at a laboratory in Ottawa.At a press conference on Thursday, the chief investigator said that any transcript of talks inside the cockpit would remain secret because such talks are confidential and protected by law.
	www.expressindia.com /ie/daily/19980913/25650234.html (194 words)

	6 Analysis of Nominal Aircraft Cockpit Voice Recorder
		Stearman has provided us with such a case with the CVR of an airplane crash in which there were no mechanical flaws.
		This is a recording in which the airplane crashed due to pilot error, and not a structural problem with the plane.
		Despite the fact that we cannot discuss the events on the recording, we can note that there was only one point in the silent track that the signal deviated outside of the normal range.
	www.ae.utexas.edu /courses/ase463q/design_pages/fall02/wavelet/6_analysis_of_nominal_aircraft_c.htm (302 words)

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