bkmk
Not on location such as yours, I was 15 feet from a 105, when it was fired. The sharpness of the sound, the crack in the air, was informative.
Later, I listened to a recording made by a British war correspondent, September 1944, of a German artillery barrage - the effects of the shells’ arrivals - at a location west of Arnhem, The Netherlands. With solid atructures and pathways paved in their target area, the sound, as if thousands of pots and pans all arrived and crashed at the same time, from great height . . . was informative.
From my studies, I learned that each individual’s sense of action and sound effects, varies. “The ‘report’,” varies.
.A 105 firing is a loud boom (I know that one very well, having served on a 105 gun crew for four months - and the only ear plugs we had were cigarette filters). When that 105 round arrived, it had a different sound entirely - a shattering "slam", a sharp crack.
Aircraft bombs are much louder and have a distinctive deep Steel-door-slamming sound - see the current videos of the Israeli bombs being dropped on Hamas strongpoints to hear what they sound like.
Rifle caliber weapons including machine guns have three sounds: the crack of the round leaving the muzzle of the weapon, the sonic crack from the supersonic flight of the round through the air and the "breaking pine board" sound of the round hitting something. You get a hundred or so men firing plus an equal number of the enemy firing in your direction, you get some idea of aural mayhem of a full-on firefight. And that chattering roar is punctuated every few seconds by the slam and whistle of the fragments of grenades being thrown.
Years ago, I had dinner with one of Hollywood's premier sound engineers - "Doc" Siegel. I spoke to him of the unrealism of the way war movies presented the sounds of weapons and he glared at me and said "we give them what the audiences EXPECTS to hear!" and that was the end of our discussion.