I'd like to find a solution for my grandpa who's severely hearing impaired to help him participating in the daily life. More specifically, I thought about an on-the-fly speech to text recognition with a very simple, large user interface on a tablet. Small enough to carry it around without bothering, but larger then a casual large mobile phone.
I thought about a tablet with a good microphone in combination with Google Live Transcribe because I was impressed how Google translate works nicely for on-the-fly translation which is built on the mentioned API. However I don't want to buy a random tablet just because of its screen but not able to catch multiple people in a room clearly because of a bad mic.
Do you have recommendations for hardware or software for that purpose?