My dad and I just got these for our trip to Savanna in a week. At low speed my dad could hear me fine but at highway speed all he could hear was that I was transmitting and could not understand what I was saying. I tried to adjust where my mic was but that didn't seem to help. Any setting adjustments that I can make??? I have a full face helmet and headset and he has a 3/4 helmet and open face headset.