Dictionary:Noise (electrical)

1. Noise in electrical or IP surveying can be a result of interference from power lines, motor-generator or electronic components, atmospheric electrical discharges (sferics), or low-frequency magnetotelluric phenomena. 2. Electrical circuit noise is caused by the randomization of conduction electrons (Johnson noise), the discreteness of magnetic transitions (Barkhausen noise), the discreteness of charge carriers in semiconductors (shot noise), modulation noise, and other causes.