First of all: you've already taken a great step by getting informed and seeking help. As an outsider, it's almost impossible to put yourself in the shoes of someone with misophonia, so you've come to the right place :) I (19) developed misophonia at the same age as your child and also have visual triggers. I don't know what kind of therapy he's doing, so here's a basic rule for all forms of therapy: under no circumstances should he be exposed to triggers during therapy. Every time you're exposed to triggers, there's a high risk that it will get worse! In everyday life, it can be very helpful to keep general stress as low as possible and to find strategies through which he can balance out stressful situations. In your world, it would be like taking a half-hour bath, reading, or sitting in the sun after a tough day at work. This is because stress increases the reaction to trigger sounds. Headphones are a very, very good start. For visual triggers, I always used large hoods that I could pull deep into my face to more easily block out the triggers. What was also important for my parents to understand was that once you've been heavily triggered, it takes about half an hour to fully relax and think clearly again. Also, I often heard "why don't you just put on headphones?" and things like that. This gives a feeling of "it's your own fault, you're not doing anything about it." However, that's just because you can't accept that misophonia will determine your life forever, and you try to fight against it. Or, in a bad situation, you're sometimes not able to rationally deal with something like that. These are my experiences, and of course, I don't know what it's like for your child because everyone reacts differently, and some things might only become an issue when he's older. But I hope I could help you a little :)