I long struggled with this condition and never thought of it as one until now. I always thought of myself as impatient, agitated or just an angry person from time to time when triggered. I am very introspective yet this has escaped my seeing it. I have no idea what sounds caused it, but grew up in a troubled home. Sounds were always early warning signals and things like chewing, talking etc blocked or prevented my hearing important sounds. For example you don’t chew loudly or talk loudly when hiding from danger. Maybe the loud unimportant sounds trigger fear, alarm and the fight or flight because we need to hear what may be coming for us. It can be overcome, but seeing it is a huge first step. Anyone who suffers from this I am certain is a strong enough person to overcome it.