Chirping Effect
Chirping may refer to: * Bird vocalization * Chirping, the act of signaling with chirps, signals in which the frequency increases / decreases with time ** Chirping, pulse compression by linear frequency modulation * Trash-talk in ice hockey See also * Chirp (other) * Chirplet transform In signal processing, the chirplet transform is an inner product of an input signal with a family of analysis primitives called chirplets.S. Mann and S. Haykin,The Chirplet transform: A generalization of Gabor's logon transform, ''Proc. Vision In ...

Bird Vocalization
Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply ''birdsong'') are the bird sounds that are melodious to the human ear. In ornithology and birding, songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations). Definition The distinction between songs and calls is based upon complexity, length, and context. Songs are longer and more complex and are associated with territory and courtship and mating, while calls tend to serve such functions as alarms or keeping members of a flock in contact. Other authorities such as Howell and Webb (1995) make the distinction based on function, so that short vocalizations, such as those of pigeons, and even non-vocal sounds, such as the drumming of woodpeckers and the " winnowing" of snipes' wings in display flight, are considered songs. Still others require song to have syllabic diversity and temporal regularity akin to the re ...
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Chirp
A chirp is a signal in which the frequency increases (''up-chirp'') or decreases (''down-chirp'') with time. In some sources, the term ''chirp'' is used interchangeably with sweep signal. It is commonly applied to sonar, radar, and laser systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum). This signal type is biologically inspired and occurs as a phenomenon due to dispersion (a non-linear dependence between frequency and the propagation speed of the wave components). It is usually compensated for by using a matched filter, which can be part of the propagation channel. Depending on the specific performance measure, however, there are better techniques both for radar and communication. Since it was used in radar and space, it has been adopted also for communication standards. For automotive radar applications, it is usually called linear frequency modulated waveform (LFMW). In spread-spectrum usage, surface acoustic wave (S ...
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Pulse Compression
Pulse compression is a signal processing technique commonly used by radar, sonar and Ultrasound, echography to either increase the range angular resolution, resolution when pulse length is constrained or increase the Signal-to-noise ratio, signal to noise ratio when the peak power and the Bandwidth_(signal_processing), bandwidth (or equivalently range resolution) of the transmitted signal are constrained. This is achieved by modulation, modulating the transmitted pulse and then Cross-correlation, correlating the received signal with the transmitted pulse. Simple pulse Signal description The ideal model for the simplest, and historically first type of signals a pulse radar or sonar can transmit is a truncated sinusoidal pulse (also called a CW --carrier wave-- pulse), of amplitude A and carrier frequency, f_0, truncated by a rectangular function of width, T. The pulse is transmitted periodically, but that is not the main topic of this article; we will consider only a single ...
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Chirp (other)
A chirp is a signal in which the frequency increases or decreases with time. Chirp may also refer to: Sounds * Bird vocalization * Chirp (rubbing sound), or stridulation, the act of producing sound by rubbing together certain body parts * Chirp (scratch), a type of scratch performed by turntablists Science and technology * CHIRP (algorithm), an algorithm used to perform a deconvolution on radio astronomy images * Chirp (company), a UK technology company * Chirp (phone), a walkie-talkie service on Sprint-Nextel's iDEN-phones * ChiRP-Seq, a biological methodology to identify DNA regions or proteins that are bound to a RNA molecule of interest Arts and entertainment * ''Chirp'' (magazine), a Canadian children's magazine * ''Chirp'' (TV series), a Canadian children's animated series * "Chirp" (''Modern Family''), a television episode *Chirp, a robin in the TV series ''Peep and the Big Wide World ''Peep and the Big Wide World'' is an Animated series, animated children's tele ...
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