Search Result for "background noise":
Wordnet 3.0

NOUN (1)

1. extraneous noise contaminating sound measurements that cannot be separated from the desired signal;
[syn: background noise, ground noise]



WordNet (r) 3.0 (2006):

background noise
    n 1: extraneous noise contaminating sound measurements that
         cannot be separated from the desired signal [syn:
         background noise, ground noise]