Tyson has a tendency to be quiet, if not wholly silent, most of the time.
Though Tyson is an excellent singer, he rarely elects to do so when he’s on his own. He spent the majority of his childhood being taught to stay quiet unless addressed directly. He doesn’t tend to make any noise unless he has to. On a good day, he’ll hum - very quietly - to himself, but singing is rare.
If one were to catch Tyson making any type of idle sound, faintly muttering to himself to straighten out his thought process is far more likely than humming or whistling. Sound for sound’s sake is asking for trouble, but - so long as he’s being quiet - speaking to himself shows that he’s working.
Generally, Tyson does enjoy his silence and tends to keep his silence even when he has background noise on, but there are times when keeping silent becomes oppressive and he needs to talk to get rid of the vice in his throat. Preferably, he would talk to his dogs, but he’ll speak to himself if it proves necessary.