noise

https://glossary.acousti.cloud/noise

"(1) sound which is undesired by the recipient. Undesired electrical disturbance in a transmission channel or device may also be termed noise, in which case the qualification electrical should be included unless it is self evident.

(2) Sound without regularities, confused sum of many unrelated sounds heard together.

(3)"white noise", the extreme case of (2), in which the sound spectrum contains all frequencies in more or less equal measure." [1]

"Used in ecoacoustics to describe non-target sounds. These could be self-noise from the recording unit, or from aspects of the soundscape such as geophony." (from the Acoustic Index User's Guide)

Reference: [1] Broughton WB. Glossarial Index. In: Acoustic Behavior of Animals. Elsevier; 1963.; Erbe et al. (2022), Exploring Animal Behavior Through Sound, Terms and Definitions. https://doi.org/10.1007/978-3-030-97540-1_4