Exactly. Toms will do something called a shock gobble. Has nothing to do with a threat just some noises makes them gobble just out of reflex. Stop and think about it, you think Nature's natural defenses would cause a turkey to gobble and give away it's location when a threat was near. Certain sounds like thunder will cause them to gobble. One woods I used to hunt we would just wait for this one mule at a nearby farm to start his morning braying. His braying would light up every gobbler in the entire woods. You can use hen yelps and cuts also to locate them but you run the risk of having any gobbler within hearing to start towards you silently and you could end up bumping them.