thermal noise

noun Thermodynamics, Electricity.
  1. a wide spectrum of electromagnetic noise appearing in electronic circuits and devices as a result of the temperature-dependent random motions of electrons and other charge carriers.
Compare shot effect.

Origin of thermal noise

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for thermal noise

thermal noise

noun
  1. electrical noise caused by thermal agitation of conducting electrons
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