White noise. A more general term would be "ambient sound" or "ambient noise", which may or may not be white noise. White noise is the combination of every sound frequency and so it is analogous to the color white, a mixture of all of the different frequencies of visible light. White noise is usually called static.
The Instrumental maybe....hopefully that's what you are looking for!
Ambiance, or Ambient Sounds White Noise
Walla is the word they use.
Din.
Sounds
silence
"Silent" have a nice day ^__^;
Pandemonium is a synonym for noise. It means wild disorder and utter chaos.
White noise
Introduction or background information.
noise, clash, clank, bang, jangle
Clangour
The cast of Background Noise - 2008 includes: Brent Hill as Paul Fiona Pepper as Lauren