Interference may refer to:

Sciences

• Interference (wave propagation), in physics, the superposition of two or more waves resulting in a new wave pattern
• Interference (communication), in telecommunication and electronics, anything which alters, modifies, or disrupts a message as it travels along a channel between a source and a receiver. Typically the term refers to the addition of an unwanted signal to the useful signal, for example:
  • Electromagnetic interference (EMI)
  • Co-channel interference (CCI), also known as crosstalk
  • Adjacent-channel interference (ACI)
  • Intersymbol interference (ISI)
  • Inter-carrier interference (ICI), caused by doppler shift in OFDM modulation (multitone modulation)
  • Common-mode interference (CMI)
  • Conducted interference
• Vaccine interference may occur when two or more vaccines are mixed together in the same formulation
• Interference fit, two items attempting to occupy the same space (eg over-size pin in hole)
• Interference engine, an engine whose pistons can strike and damage the piston valves when the engine is cranked while the timing belt is broken
• Interference theory in psychology
• Statistical interference is a method of determining when one distribution of values exceeds another
• Interference (genetic), a phenomenon by which a chromosomal crossover in one interval decreases the probability that additional crossovers will occur nearby

Linguistics

• Language interference, a nontechnical term referring to the transfer of native language grammar and pronunciation into the learning and use of a second language
• Narrative interference, such as a cline of narrative interference

Law

• Humanitarian interference in law
• Interference proceedings of the United States patent law

Sports

• Interference (chess), when a piece is sacrificially interposed between attacker and defender.
• Interference (ice hockey), the penalty where a player impedes the movement of another player who does not have the puck
• Interference (baseball), an infraction where a person illegally changes the course of play from what is expected
• Pass interference, a penalty in American football and Canadian Football

Media

• Interference (film), Paramount Pictures' first all-talking feature film, made in 1928
• Interference (album), a 1998 album by Cubanate
• Interference (book), a 1984 book by Nick Rhodes containing manipulated Polaroids.
• Interference: Book One, the first book in a two-book duology of Doctor Who books of the Eighth Doctor Adventures
• "Interference" (Prison Break episode), the 49th episode of the TV series Prison Break

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