It is just two pieces of hard flat wood, usually pine or cedar, that are banged together to signify the last 10 rends. It is similar to a judges gavel to get the attetion of the court.
It is typically the hammer hitting the base of the stand on which the bell is situated.
I call it the clack-clack.
Instrument? It's probably just two pieces of of wood clacked together.
In boxing and MMA matches when there is about 10-20 seconds to go in the current round a sound can be heard like a "CLICK-CLICK-CLICK".
What I'd like to know is -- what is this sound called and what is the name of instrument that makes this sound called?
Many thanks