s, a, o, b, d, g, k, l, n, c, r, i, u are letters that make 'background signal'
ground, sign, BA, si, UN, Ba, AC, Ro, SI, kg, round, signal, back, background, AL, ND, Ac, Al, Nd, Si, Na, Ig are words within 'background signal'
1 possible definitions for 'background signal'
Under this definition, background signal is a noun and has the following properties:
background has the same meaning as background signal
'background signal' can be a type of noise, interference, disturbance.
background noise, ground noise, background radiation are types of 'background signal'.
"they got a bad connection and could hardly hear one another over the background signals"