Not quite a direct answer to the OPs question. Most posters have answered as best as possible.

I try to work the hunt without causing the tom to gobble more than is necessary for me to place his location or follow his movement. If I know his location and whether he is moving, I mostly stay quiet. Gobbles attract other hunters. I prefer just enough gobbles to get the job done. A vocal gobbler is an advertisement for other hunters and predators.

Another thought. If the hunter is calling and moving towards a stationary gobbler, he will wait for you (the hen) to come to him.