Hyperacusis

I suffer from hyperacusis. A car horn sounding near me, supermarket alarm, child screaming etc..... can make me shout out, throw me forwards or make me cower down. I cannot control it. It is very distressing and when it happens I have to get myself home as quickly as possible, I cannot think clearly and my nerves ring like a cymbal for a day or two . My doctor is referring me to the audiology department at a hospital.
I am envisaging that for the safety of myself and others I will have to wear some kind of special noise limiting earplug when I am outside the house (until a long-term treatment is found).
Assuming there is an ear plug that will control the noise to a point where it is safe to go out, do I complete section 11 and 12 of the PIP form as if I am using the earplugs or without.
Thank you in advance.
Kevin