Up until now, our dogs have worn traditional collars with their tags jingling away. In fact, I can tell which dog is coming around the corner based on the way their tags sound. Both are easy to find because when you call their name and they lift their heads, you can hear the jingling and find them reasonably soon. However, there are downsides, like Schatzi's jingling all night long as she explores the living room, jumps off and on the bed, and settles down her crate, which has led to us removing her collar nightly.
During Schatzi's first hunting trip of the fall, though, her collar got caught up on some brush, which led to Joe order both dogs hunting collars with a flat plate riveted on the collar. No more tags (although, they probably should have their rabies tags attached somehow)...and now, we are enjoying the sweet sound of silence.