The father is played by a IRL Deaf Actor.f the Daughter had to have her telepathy suppressed, then the same is probably true for her parents and children. What's with Dad taking that broach off his neck at the end? Was that also an inhibitor?
The broach is a artificial Speech Generator, that's why his voice was dubbed over.
When he took off the broach, he said "Yeah" with his IRL voice.
And the Father is a Empath, the daughter is the opposite, she's too powerful so she needs a Neural Inhibitor to dampen her powers.
In his family lineage, powers must've skipped a generation, the father didn't get much besides being a Empath.
The Daughter is Uber Powerful.
The Son seems to be a normal Empath from what we can tell.