Copyright © Philip M. Parker, INSEAD. Terms of Use.

Jamming

Definition: Jamming

Jamming

Noun

1. Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems.

Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.
 

Date "jamming" was first used in popular English literature: sometime before 1874. (references)


Specialty Definition: Jamming

DomainDefinition

Aerospace

Intentional transmission or reradiation of radio signals in such a way as to interfere with reception of desired signals by the intended receiver. (references)

Computing

A disturbance experienced in the reception of a wanted signal, caused by an unwanted signal(s)or noise. Source: European Union. (references)

Mechanical Engineering

Mechanical, electrical or other device for preventing the operation of a piece of apparatus under certain conditions. Source: European Union. (references)

Post & Telecom

A deliberate interference, due to unwanted signals, which is intended to render unintelligible or falsify the whole or part of the desired signal. Source: European Union. (references)

Public Administration

The international disturbance or obliteration of radio or acoustic waves with the view to rendering them unintelligible, e. g. signals on an enemy broadcast. Source: European Union. (references)

Source: compiled by the editor from various references; see credits.

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Specialty Definition: Jamming

(From Wikipedia, the free Encyclopedia)

Jamming is an electronic warfare (EW) technique to limit the effectiveness of an opponents communications and/or detection equipment.

Radio Jamming

Communications jamming is usually aimed at radio signals to disrupt control of a battle. A transmitter, tuned to the same frequency as the opponents receiving equipment and with the same type of modulation, can with enough power override any signal at the receiver. The most common types of this form of signal jamming are: Random Noise; Random Pulse; Stepped Tones; Wobbler; Random Keyed Modulated CW; Tone; Rotary; Pulse; Spark; Recorded Sounds; Gulls; and Sweep-through. All of these can be divided into two groups - obvious and subtle.

Obvious jamming is easy to detect as it can be heard on the receiving equipment, it is some type of noise such as stepped tones (bagpipes), random-keyed code, pulses, erratically warbling tones, and recorded sounds. The purpose of this type of jamming is to block out reception of transmitted signals and to cause a nuisance to the receiving operator.

Subtle jamming is that during which no sound is heard on the receiving equipment. The radio does not receive incoming signals yet everything seems superficially normal to the operator. These are often techical attacks on modern equipment, such as 'SQUELCH capture'.

Radar Jamming

Radar jamming is the intentional emmission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with false information. There are two types of radar jamming - noise jamming and deception jamming.

A noise jamming system is designed to delay or deny target detection. Noise jamming attempts to mask the presence of targets by substantially adding to the level of thermal noise received by the radar. Noise jamming usually employs high power signals tuned to the same frequency of the radar. The most common techniques include barrage, spot, swept spot, cover pulse, and modulated noise jamming. Noise jamming is usually employed by stand-off jamming (SOJ) assets or escort jamming assets.

Deception jamming systems (also called repeat jammers) are designed to offer false information to a radar to deny specific information on either bearing, range, velocity, or a combination of these. A deception jammer receives the radar signal, modifies it and retransmits the altered signal back to the radar.

Initially, the challenge was simple - tune in to the fixed frequencies of the radar, and then start jamming on those frequencies. However, as radars became more sophisticated they used irregular noise superimposed on the radar signal to cloak it, and the signals were broken up into short bursts, and the frequencies used were changed rapidly and constantly.

Radar jamming for the purposes of defeating speed detection radar is simpler than for military application, although it is often illegal.

E-mail Jamming

E-mail jamming is used by some civil rights activists to thwart government spy networks such as Echelon. Activists deliberately include "sensitive" words and phrases in otherwise innocuous emails to ensure that these are picked up by the monitoring systems. The theory is that the senders of these emails will eventually be added to a "harmless" list and their emails no longer intercepted, thus allowing them to regain some privacy.

E-mail jamming has become increasingly popular in the UK since the introduction of the Regulation of Investigatory Powers Act by Jack Straw and its extension by David Blunkett.

Jamming was the name of a late 1970s to early 1980s UK music fanzine edited by Tony Fletcher.

Jamming (or jam session) is also a term used to refer to an informal, semi-improvised performance by a group of rock or jazz musicians.

In rock climbing, Jamming refers to a set of climbing moves that involve wedging a body part into a crack.

Culture Jamming, or sniggling, is the act of using existing mass media to comment on those very media themselves, using the original medium's communication method.

Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Jamming."

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Abbreviations & Acronyms: Jamming

The following table is compiled from various sources, across various languages. When English abbreviations or acronyms come from a non-English source, this is noted.
EntrySourceExpressionField
JAWSEnglishJamming and warning systemComputing

Source: compiled by the editor, based on several corpora (additional references).

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Synonyms: Jamming

Synonyms: electronic jamming (n), jam (n). (additional references)

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Crosswords: Jamming

English words defined with "jamming": barrage jammingjammerselective jamming, Shoulder block, spot jamming. (references)
Specialty definitions using "jamming": acoustic warfare countermeasures, ADHESIVE-BANDAGE-MACHINE OPERATOR, anti-jam, ASSEMBLER, FILTERS, AUTOMAT-CAR ATTENDANT, automatic-coil-machine operatorbeet flumer, beverage-inspection-machine tender, bottle inspector, BOTTLED-BEVERAGE INSPECTOR, BOX-SEALING INSPECTOR, BRICK UNLOADER TENDER, BRIQUETTER OPERATOR, bump-grader operatorCARTON-FORMING-MACHINE TENDER, chain-machine operator, COIL ASSEMBLER, MACHINE, coil tier, CORE-COMPOSER-MACHINE TENDERDRIER OPERATOR II, DRIER OPERATOR IV, DUSTLESS OPERATORElectronic Protectionfabric-separator operator, FLUMER I, frequency agilityGAUGE-AND-WEIGH-MACHINE OPERATORheading-and-priming operator, HIGH-DENSITY FINISHING OPERATORlining printer, lollypop maker, lollypop-machine operatorMEAT BLENDER, MILL OPERATOR, ROLLS, MILLER, WOOD FLOUR, MOUNTER, AUTOMATICPAD-MACHINE FEEDER, PASTEURIZER, PICKER TENDER, PINKING-MACHINE OPERATOR, plant-operator helper, POTATO-PEELING-MACHINE OPERATOR, PRIMER-INSERTING-MACHINE OPERATOR, priming-machine operatorroll operatorSAFETY-PIN-ASSEMBLING-MACHINE OPERATOR, scoop-machine operator, shredding-machine operator, SLASHER OPERATOR, slasher sawyer, spray drier, spread spectrum communications, STRAINER TENDER, strainer-mill operator, STRIP-CUTTING-MACHINE OPERATOR, SUCKER-MACHINE OPERATORtaboo frequency, teletypesetter monitor, TIP PRINTER, tobacco cutter, tuber operator, tunnel-drier operator, TYPESETTING-MACHINE TENDERUNIT OPERATORVENEER JOINTERWHEAT CLEANERyeast-cake cutter, YEAST-CUTTING-AND-WRAPPING-MACHINE OPERATORZIPPER-MACHINE OPERATOR. (references)

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Modern Usage: Jamming

DomainUsage

Screenplays

I let that sneaky lizard lead me right into Megatron's jamming zone. (Beast Wars: Transformers; writing credit: Bob Forward; Lawrence G. DiTillio)

So cute I'm thinking about jamming this pen in my eye. (Friends; writing credit: Jörn O. Jensen; Birger Larsen)

Six says we're jamming him up back there. (Platoon; writing credit: Oliver Stone)

Lyrics

That'd be down stairs laughing and jamming (Ain't No Place Like Home; performing artist: Prince)

Source: compiled by the editor from various references; see credits.

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Commercial Usage: Jamming

DomainTitle

Books

  • Rock n' Blues Harmonica: A World of Harp Knowledge, Songs, Stories, Lessons, Riffs, Techniques and Audio Index for a New Generation of Harp Players (Includes book and 74 minute stereo CD Jamming Buddy) (reference)

  • Principles of electrolocation and jamming avoidance in electric fish : a neuroethological approach (reference)

    (more book examples)

  

Theater & Movies

  • Bluegrass Jamming (reference)

  • Flea: Adventures In Spontaneous Jamming & Technique (reference)

  • Cowboy Bebop - Jamming With Edward (Vol. 5) (reference)

    (more DVD examples; more video examples)

  

Music

Source: compiled by the editor from various references; see credits.

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Image Slideshow: Jamming

Photos:
Jamming

More pictures...

Computer Images:
Jamming

More pictures...

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Photo Album: Jamming

ThumbnailDescription & Credit

Delivery trucks jamming West 37th Street, looking west from 7th Avenue, New York City] / World-Telegram p. Credit: Library of Congress; photo by Al Aumuller..

Source: pictures compiled by the editor from various references; see picture credits.

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Non-Fiction Usage: Jamming

SubjectTopicQuote

Civil Liberties

China

Government jamming of RFA is more frequent and effective. (references)

Cuba

Radio Marti broadcasts at times overcame the jamming attempts on short-wave bands, but its medium-wave transmissions were blocked completely in Havana. (references)

Travel

Russia

On inter-city overnight trains, secure the door to your compartment with some sort of jamming device (many people simply use a wire coat hanger). (references)

Worker Rights

China

The signals of the Tibetan language services of Voice of America (VOA) and Radio Free Asia (RFA) as well as of the Oslo-based Voice of Tibet suffer from the same jamming of their frequencies by Chinese authorities as the signals of their Chinese language services. (references)

Source: compiled by the editor from ICON Group International, Inc.; see credits.

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Usage Frequency: Jamming

"Jamming" is generally used as a lexical verb (-ing form) -- approximately 79.25% of the time. "Jamming" is used about 106 times out of a sample of 100 million words spoken or written in English. Its rank is based on over 700,000 words used in the English language. Some parts-of-speech are not covered due to the samples used by the British National Corpus. (note: percents less than one-hundredth of one percent have been omitted)
Parts of SpeechPercentUsage per
100 Million Words
Rank in English
Lexical Verb (-ing form)79.25%8436,109
Noun (singular)12.26%1397,576
Noun (proper)6.6%7133,076
Adjective (general or positive)1.89%2245,945
                    Total100.00%106N/A

Source: compiled by the editor from several corpora; see credits.

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Expressions: Jamming

Expressions using "jamming": active radio jamming barrage jamming electronic jamming jamming station jamming transmitter radar jamming radio jamming selective jamming spot jamming sweep jamming window jamming. Additional references.

Hyphenated Usage

Beginning with "jamming": jamming-avoidance.

Ending with "jamming": anti-jamming, hand-jamming, missile-jamming.

Source: compiled by the editor from various references; see credits.

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Frequency of Internet Keywords: Jamming

The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com.
 
ExpressionFrequency
per Day
ExpressionFrequency
per Day

culture jamming

19

gsm jamming

3

jamming

13

95.5 jamming

3

gps jamming

13

bob jamming lyrics marley

3

94.5 jamming

10

jamming video

3

radar jamming

10

jamming with edward

3

ecm jamming technique

7

bob jamming marley

3

cell jamming phone

6

jamming laser military

3

laser jamming

5

devise jamming radio

3

99 alq band jamming low system tactical tranmitter

4

105.9 jamming

2

90 jamming z

4

cell device jamming phone

2

gem jamming

4

jamming leather

2

jamming z90

4

anti jamming

2

festival heineken jamming

4

cat from gilly good guitar handed his jamming japan left like played some weird who

2

jamming mobile phone

4

jamming zoo

2

jamming radio

4

cell equipment jamming phone

2

jamming production

4

jamming lyrics

2
Source: compiled by the editor from various references; see credits.

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Modern Translation: Jamming

Language Translations for "jamming"; alternative meanings/domain in parentheses.

Albanian

  

zhurma (statics), shtrëngim (clutch, coercion, compulsion, constriction, constringency, contraction, fastening, grasp, grip, gripe, griping, hug, jam, jaw, pinch, pressure, restraint, squeeze, strangulation), pengesë (balk, bar, barrier, baulk, block, boom, chock, clog, cramp, crash barrier, cumber, detention, difficulty, dike, disadvantage, drag, drawback, encumbrance, fetter, handicap, hedge, hindrance, hitch, hold up, holdback, hurdle, impediment, interference, interruption, liability, manacle, mash, obstacle, obstruction, preclusion, pullback, retardation, retardment, rub, setback, stay, stoppage, stumbling block, stumbling-stone, stunt, traverse, trip up), bllokim (block, blockage, blocking, deadlock, hold up, holding, impediment, jam, jam up, locking, logjam, obstruction, occlusion, overlap, strangulation). (various references)

   

Arabic 

  

‏حاجز (arresting, bail, bar, barricade, barrier, block, dike, divider, division, dyke, fence, levee, obstacle, parapet, partition, rail, screen, stem, traverse), ‏تشويش إذاعي (strays), ‏إنسداد (jam, obstruction, obtuseness, occlusion, stop, stoppage, stopping). (various references)

   

Bulgarian 

  

натъпкване (crowding, jam, stuffing), натискане (jam, press, pressing), заяждане (cavil, jam, nag), заглушаване (blackout, damping, interception, jam), претъпкване (jam, overcrowding), притискане (constriction, jam, press, squeeze). (various references)

   

Chinese 

  

阻塞 (jammed). (various references)

   

Czech

  

tlaèenice (crowd, crush, hustle, jam, overcrowding, squash, squeeze, throng), rušení (disturbance, interference). (various references)

   

Danish

  

støjsending, støjsenderforstyrrelser, interferensfænomen (interference, jam), interferens (intererence, interference), forstyrrelse (disorder, disordering, disturbance, failure, incident, interference, jam, operating trouble, perturbation, to disturb, trouble). (various references)

   

Dutch

  

storingsprodukt (interference, jam), storing (disquiet, disturbance, hindrance, interference, trouble, unrest), storen (bar, bother, disturb, hinder, inhibit, prevent, trouble), opzettelijke storing, blokkering (atrioventricular block, binding, block, blockade, blockage, blocking, cardiac block, choking, heart block, heart-block, immobilisation, immobilization, infiltration, interlock, locking, mute, muting, noise suppression, putting on the skid, skidding, squelch, stopping). (various references)

   

Farsi 

  

گیر (Embroglio, Fix, Gripe, Hitch, Impasse, Impediment, Obstacle, Scrape, Snag, Trap), گرفتگی (Congestion, Eclipse, Melancholia, Obstruction). (various references)

   

Finnish

  

häirintä (masking). (various references)

   

French

  

brouillage (jam), blocage. (various references)

   

German

  

störung (derangement, disorder, disruption, disturbance, fault, hitch, hold up, interference, interruption, intrusion, malfunction, perturbation, trouble, upset, violation). (various references)

   

Greek 

  

παρεμβολή (insertion, interference, interpolation). (various references)

   

Hebrew 

  

חסימ" (obstruction, obturation, occlusion), "פרעת "ש"ור. (various references)

   

Hungarian

  

zavaró adás (blanketing), zavarás (blanketing, disorder, distraction, disturbance, interference, jam, perturbation), rádióvétel, rádióadás (emission), aktív zavarás. (various references)

   

Indonesian

  

kemacetan (bottleneck, breakdown, logjam, shutdown, stoppage). (various references)

   

Italian

  

interferenza (interference), inceppamento (jam), grippaggio (seizing, seizure), disturbo intenzionale, disturbo con interferenza, disturbo (ailment, bother, complaint, derangement, disorder, disturbance, fault, illness, inconvenience, noise, obstruction, trouble, upset). (various references)

   

Japanese Kanji 

  

妨害 (disturbance, hindrance, interference, obstruction). (various references)

   

Japanese Katakana 

  

ぼうがい (disturbance, hindrance, interference, obstruction, unanticipated, unexpected), ""し" (cross talk, friendship, interference, intimacy, with all one's might, with one's whole body), ジャミング . (various references)

   

Korean 

  

움직이지 않게 함. (various references)

   

Pig Latin

  

ammingjay

   

Portuguese

  

ligação (attachment, bond, call, catenation, coherence, coherency, conduit, connection, connexion, contact, coupling, cufflink, intercourse, lead, liaison, nexus, slide, touch, union), interferência provocada, interferência (eject, interference, meddling, stoppage), encravamento (immobilisation, immobilization, interlock, interlocking, latch, scotching), compressão (compression, constriction, crush, pressure, retrenchment, squeeze), bloqueio (bolting), aperto (abashment, bind, clamping, clench, clutch, crush, grasp, grip, gripe, hug, hustle, jam, narrowness, perplexity, pinch, screw, shake, squeeze, stricture, tightness), apertadela (felter), acumulação (accumulation, assembly, congeries). (various references)

   

Russian 

  

глушение, защемление (jam), заклинивание, заедание (jam, seizing). (various references)

   

Serbo-Croatian

  

zaglušivanje, prigušivanje (damping). (various references)

   

Spanish

  

interferencia (interference, jam, mush). (various references)

   

Swedish

  

störning (derangement, disruption, distraction, disturbance, interference, perturbation). (various references)

   

Turkish

  

yayını bozma, tutukluk (block, breakdown, seizing), sıkışma (having hard time, incarceration, pressure, squeeze), parazit yapma. (various references)

   

Ukrainian

  

глушіння (damping), заїдання (sticking), затор (congestion, dead lock, gorge, hold up, jam, lock, stopping). (various references)

Source: compiled by the editor from various translation references.

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Derivations & Misspellings: Jamming

Derivations

Words ending with "jamming": antijamming, unjamming, windjamming. (additional references)

Words containing "jamming": windjammings. (additional references)


Misspellings

"Jamming" is suggested in spellcheckers for the following: jamin, jaming, jammen, jammin, jamun, jazmin. (additional references)

Source: compiled by the editor, based on several corpora (additional references).

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Rhyming with "Jamming"

# of Phoneme MatchesPronunciationWord(s) rhyming with "jamming" (pronounced ja"ming)
4-a" m i ngcramming, damming, damning, lambing, ramming, slamming.
3-m i ngacclaiming, affirming, aiming, alarming, arming, assuming, barnstorming, beaming, becoming, blaming, blooming, blossoming, bombing, booming, bottoming, brainstorming, brimming, calming, charming, claiming, climbing, combing, coming, condemning, confirming, conforming, consuming, daydreaming, deprogramming, diagraming, dimming, disarming, disclaiming, dooming, dreaming, drumming, dumbing, embalming, exclaiming, farming, filming, firebombing, firming, flaming, foaming, forming, forthcoming, framing, fuming, gaming, gleaming, gloaming, grooming, harming, heartwarming, helming, hemming, homecoming, homing, humming, incoming, inflaming, informing, lemming, liming, looming, maiming, mainstreaming, misinforming, mushrooming, naming, nonperforming, numbing, oncoming, outperforming, overcoming, overwhelming, performing, plumbing, presuming, priming, proclaiming, programing, programming, reaffirming, rearming, reclaiming, redeeming, reforming, renaming, reprogramming, resuming, rhyming, roaming, rooming, scheming, screaming, seeming, shaming, shortcoming, skimming, slimming, squirming, steaming, stemming, storming, streaming, strumming, succumbing, summing, swarming, swimming, taming, teaming, teeming, terming, thumbing, timing, transforming, trimming, unassuming, unbecoming, upcoming, vacuuming, warming, welcoming, zooming.

Source: compiled by the editor (additional references); see credits.

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Anagrams: Jamming

Scrabble® Enable2K-Verified Anagrams

Words within the letters "a-g-i-j-m-m-n"

-2 letters: gamin.

-3 letters: agin, amin, gain, imam, magi, maim, main, mina.

-4 letters: aim, ain, ami, ani, gam, gan, gin, jag, jam, jig, jin, mag, man, mig, mim, nag, nam, nim.

-5 letters: ag, ai, am, an, in, ma, mi, mm, na.

 Words containing the letters "a-g-i-j-m-m-n"
 

+2 letters: unjamming.

 

+4 letters: antijamming, windjamming.

 

+5 letters: windjammings.

Source: compiled by the editor from various references; see credits.

SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.

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Alternative Orthography: Jamming


Hexadecimal (or equivalents, 770AD-1900s) (references)

4A 61 6D 6D 69 6E 67

Leonardo da Vinci (1452-1519; backwards) (references)

American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)

=

Semaphore (1791, in France) (references)

Braille (1829, in France) (references)

Morse Code (1836) (references)

.---    .-    --    --    ..    -.    --.

Dancing Men (Sir Arthur Conan Doyle, 1903) (references)

Binary Code (1918-1938, probably earlier) (references)

01001010 01100001 01101101 01101101 01101001 01101110 01100111

HTML Code (1990) (references)

&#74 &#97 &#109 &#109 &#105 &#110 &#103

ISO 10646 (1991-1993) (references)

004A 0061 006D 006D 0069 006E 0067

British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)

Encryption (beginner's substitution cypher): (references)

44677979758073

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INDEX

1. Definition
2. Synonyms
3. Crosswords
4. Usage: Modern
5. Usage: Commercial
6. Images: Slideshow
7. Images: Photo Album
8. Quotations: Non-fiction
9. Usage Frequency
10. Expressions
11. Expressions: Internet
12. Translations: Modern
13. Abbreviations
14. Acronyms
15. Derivations
16. Rhymes
17. Anagrams
18. Orthography
19. Bibliography


  

Copyright © Philip M. Parker, INSEAD. Terms of Use.