Guys, this may be an odd one!
My sister-in-law has been increasingly deaf for years, has had a cochlear implant fitted a month or so ago. Her husband has to be careful as she now hears what he says.
More seriously though, she has found it a blessing, but we have noticed problems with communications by phone. We know it will improve, but I'd like to know, is there something like compression applied in the transmission caller to called, which causes her difficulty?