B1
when there is no sound
Dictionary examples:
The silence in the exam room was interrupted by someone's growling stomach. (0.0)
The silence in the classroom was broken by a sudden sneeze explosion. (0.0)
The librarian's deadly stare created instant silence in the noisy room. (0.0)
The three men ate in silence. (24.1)
A loud crash of thunder broke the silence of the night. (44.4)