TX G Mom-we had issues like you are describing when Butter was in a regular classroom. In their school, they were grouped together, often facing each other, not the front of the classroom, starting in first grade. It was a nightmare and a disaster. I BEGGED for 2+ years for Butter to get her own seperate desk that always face the front. We finally got it in 3rd (earlier this year) but it was too little, too late.
When the school psych pulled Butter out to discuss class with her, Butter asked for headphones, ear plugs, a seperate desk, but she would refuse the "privacy board" because that didn't really block out the noise for her and stigmatized her. Of course, the teacher would not capitulate with earplugs, etc. Butter often complained of the same issues, that it was always "loud" or noisy, she couldn't hear the teacher, etc...and I know she has the same hyperfocus issues, so if she is into the work, looking down at the paper, forget it, doesn't hear A THING! lol!
I know her hearing is just fine, according to the tests, but this is also why I'm suspecting NVLD or the ADHD inattentive type. We have changed schools to a homestudy program, so she only goes into a classroom once a week for three hours. The other "class" settings like strings, guitar, multimedia, art, are all of her choosing so she is better able to focus and, except for art, those are only 1 hour blocks of time...this is better, but not a total answer and I can't control the environment for her all the time of course...you are lucky the teacher is listening to you...ours just kept saying Butter was all to blame, that she chose to not listen and was a behavior problem

The fact that she seems to hear me just fine most of the time doesn't surprise me either...she's been hearing MY voice since the womb. I also have a rather deep and loud voice that carries and cuts through background noise in a way that most women do not. Like when I speak sharply, kids who aren't mine listen, lol!
I'm just a point where I'm not sure what I should do next as far as Girl Scouts and when I'm not there...she doesn't seem to have a problem at camps, at least not to the point where they call me to complain or say she can't come back. *sigh* that's all I've got left this morning, lol!