Band's sound (4)
I believe the answer is:
ring
I believe this is a double definition.
'band's' is the first definition.
('ring' can be a synonym of 'band')
'sound' is the second definition.
(ring is a kind of sound)
(Other definitions for ring that I've seen before include "Make sound like phone" , "Circle; telephone" , "Chime" , "Group operating illegally < call" , "Call - cartel" .)