An unwanted electric current path in a circuit resulting in stray signals or interference, occurring for example when two earthed points in the same circuit have different potentials.
接地回路
North American term ground loop
Definition of earth loop in US English:
earth loop
noun
An unwanted electric current path in a circuit resulting in stray signals or interference, occurring, e.g., when two earthed points in the same circuit have different potentials; a ground loop.