Beeping when braking to a stop.

When I’m driving in traffic and come to a stop I personally put the car into neutral (manual gearbox) and then just press the brake to stop. When I do this the car beeps at me. I can only guess it wants me to keep the clutch down and in gear until I come to a stop.
Am I correct in thinking this, also how do I turn the beep off, if possible.

Any help/advise is much appreciated.