11.   The physical effort required in speaking would also be less than against a background noise of heavy traffic.

12.   The sound recording consists of the background noises natural to the location.

13.   The voice could then be raised until the instrument responded to it above the level of the background noise.

14.   We learn to filter out background noise when listening to a particular voice.

15.   Microphones tend to pick up a lot of background noise, which then has to be edited out.

16.   The sound of sirens was an omnipresent background noise in New York.

17.   Objects in the real world do not behave in such a crazy way, so the brain can safely filter out the apparent echo as background noise.

18.   RESIDENTS in Billingham were warned today of the possibility of increased background noise from an ICI plant over the next few weeks.

19.   Well how about the background noise?

20.   Will it, can it do the background noise?