External voltage

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An external voltage is an interference level caused by system-related electrical sources of interference in a transmission system for acoustic signals .

In contrast to the noise voltage , which often has similar causes, the measurement of the external voltage is carried out with an amplifier that is linear over almost the entire transmission range of the system . H. Thus with a linear in the central region weighting filter . In particular, the mains hum and high noise come into full effect.

To determine the external voltage distance , the external voltage is related to the useful voltage (usually the control limit or nominal level of the useful electrical signal ) of the transmission system.


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