Ringtone control frees you from worries when to put volume down.
Just choose location(s) where you want to activate the desired actions.
You can also adjust the sensitivity via menu control.

With three easy steps you're ready for action:
-Find favorite places on the map,
-Select conditions that must be fulfilled when you find yourself in one of these places,
-Start the service, which will run in the background

Enjoy.

Screenshots: