I recall a study back in the mid 90s US university who carried out this problem/situation/a2a comms. Long story short, If one spoke in a deep slow baritone voice (actor Roger Moore) comms are more understandable. Just requires a bit of practice to do a Roger Moore voice.
Well, that would be the only thing I would have in common with Roger Moore.
I have been told that my radio voice is a lot different than my normal conversational voice, my voice on the radio is deeper and slower. So there might be something to that.
What bothered me the most, were the guys (and gals believe or not) that faked the Chuck Yeager yawl, like; 'Ahh, XXX 465 is, ahh, out of, ahh, 31.0 to, ahh, 24.0.'
Drove me crazy.