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In electronics, noise is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly as it is produced by several different effects. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, which needs a steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.

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  • Rauschen (Physik)
  • Noise (electronics)
  • Ruido (física)
  • Bruit de mesure
  • Ruído (comunicação)
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  • En el ámbito de las telecomunicaciones y de los dispositivos electrónicos, en general, se considera ruido a todas las perturbaciones eléctricas que interfieren sobre las señales transmitidas o procesadas. También, de una forma general el ruido se asocia con la idea de un sonido molesto, bien por su incoherencia, por su volumen o por ambas cosas a la vez.
  • Na comunicação, ruído se denomina todo sinal indesejado que está justaposto a um sinal útil, ou seja, é o resultado de vários tipos de perturbações que tendem a atrapalhar uma informação quando ele é apresentado numa frequência considerável dentro da amplitude de todos os sinais. O ruído pode ser proveniente de várias causas, por exemplo, eletrônicos ou interferência de sinais externos.
  • In electronics, noise is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly as it is produced by several different effects. Thermal noise is unavoidable at non-zero temperature (see fluctuation-dissipation theorem), while other types depend mostly on device type (such as shot noise, which needs a steep potential barrier) or manufacturing quality and semiconductor defects, such as conductance fluctuations, including 1/f noise.
  • Unter Rauschen (auch Untergrund genannt) versteht die Physik allgemein eine Störgröße mit breitem unspezifischem Frequenzspektrum. Es kann daher als eine Überlagerung vieler harmonischer Schwingungen oder Wellen mit unterschiedlicher Amplitude und Frequenz beziehungsweise Wellenlänge interpretiert werden.
  • Une mesure est une opération qui permet d'enregistrer des données, relatives à un phénomène physique. Dans l'idéal, on obtiendrait une mesure correspondant directement aux quantités pertinentes que l'on cherche à quantifier. Mais, dans la réalité, lorsque l'on réalise des mesures, on observe l'apparition de signaux parasites qui viennent se superposer au signal dit utile (i.e l'information que l'on souhaite récupérer). Ces signaux sont une gêne pour la compréhension de l'information que le signal transporte.
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