White noise is sound, especially of a loud, continuous, or unpleasant kind, that seems to have no pattern or rhythm.
They were made to listen to white noise, such as static of the sort you might pick up between radio stations.
N-UNCOUNT
WHITE NOISE
Meaning of WHITE NOISE in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006