Welcome to the forum Maz066.
Lowering the sensitivity does cut down on background noise to a degree. I have mine set on 9 my AuD doesn’t recommend it. I find it works for me though.
As far as meetings go, if you have an iPhone you could try “live listen” this is only good for a maximum of 8 people though, it works like a microphone. Other than that you could use a mini mic to help you in larger meetings.
Good luck.