Noise measurement

from Wikipedia, the free encyclopedia

The noise measurement is a method for determining the size of natural, randomly generated noise voltages in electronic systems. The interference voltages have a continuous spectrum and are not part of a useful signal . The method is used to determine its influence on useful signals, e.g. B. the measurement, control, or communication technology to verify.

A useful signal can itself have a noise character or drift , and technical devices can generate quasi-random interference voltages, but in German-speaking countries these are generally not referred to as noise (in contrast to English usage) .

The following can therefore be considered as the aim of the noise measurement:

The result of the noise measurement is either an absolute value (e.g. noise voltage or noise power of a noise source ) or a relative information on an impaired signal (e.g. noise factor , noise figure , SNR ).

literature

  • H. Meinke, FW Gundlach: Pocket book of high frequency technology. Volume 3: Systems. 5th edition. Springer Verlag, Berlin / Heidelberg 1992, ISBN 3-540-54716-9 .
  • FR Connor: Noise. Random signals - noise measurement - system comparison, Friedrich Vieweg & Sohn Verlag, Wiesbaden 1986, ISBN 978-3-528-04376-6 .
  • Andreas Friesecke: The audio encyclopedia. A reference book for sound engineers. Saur, Munich 2007, ISBN 978-3-598-11774-9 .

Individual evidence

  1. ↑ Harry Pfeifer : Electronic noise. Volume 1: Noise Sources. BG Teubner Verlagsgesellschaft, Leipzig 1959.

Web links