Lexikon Brummschleife specifications
Category : Lexicon
Electrical circuit in which an unwanted current (interfering current) flows, the frequency of which is related to that of the power grid. A coupling mechanism (usually via a common impedance) ensures that the interference signal is coupled into another circuit, which carries the useful audio signal. As a result, the interference is superimposed on the useful signal and becomes audible. Since the mains frequency in Europe is 50 Hz, the interference contains frequencies of 50 Hz and its multiples (harmonics). This manifests itself as humming or buzzing.
See also:
- Hum loop in Wikipedia
- Knowledge thread in the Hifi forum
- Questions about hum loops and hum disturbances appear very regularly in the Hifi forum, a search in the forum can therefore provide a large amount of useful information about the fix.
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