Congrats on the bull sir. Last year was the first of 5 that they were silent. I have heard from many people that we should be in the mix of it. Hoping for a great season.
Just a thought to frame things a little WRT "hearing them"......keep in mind what they are saying when bugling. Contact bugles have arguably three levels (most common heard) Outside of a rut fest going on most public land mature bulls are going to sort the number of cows they can handle and get them into an area he can defend.
Lastly....the cows are running the show....they pick and choose who they are going with. Even if quiet.....glass em up....figure out the bedding area.....get close/with good wind....and make the correct type of calls depending on the overall mood of the herd and bull.
Its nice to hear the bugling......IMO though we put a little too much emphasis on it because it makes us humans feel good vice concentrating on what they are saying. When I started thinking like that.........my success rates went up ( archery/muzzleloader) The "mix of it" is very consistently tied to the most cows being in estrus 22/23 Sept. Good luck on the hunt and enjoy the time in the woods.