These kinds of swings usually provide a lower continuous noise that can be soothing for most babies, but irritating to others. (babyambition.com)
Tinnitus is a condition of temporary or continuous noises like buzzing or humming in the ears or «in the head» of a person, with no external source. (calmnatural.com)
B. 5 defines a nuisance barking dog as, «Any animal which howls, yelps, whines, barks or makes any noises in such a manner as to disturb any person or neighbourhood to an unreasonable degree, taken to be continuous noises for a period of 10 or more minutes or intermittent noises that totals a period of 20 or more minutes.....» (edmondswa.gov)