Have you ever heard of Dabrowski's overexcitabilities or sensory integration issues? Many, many people are extremely sensitive to loud noises, and it is not always a psychological 'disorder', but can be a neurological sensitivity. In other words, it can just be the way a person is 'wired'. I am sensitive to noise, and seek to escape it as soon as I can. There's nothing wrong with that, it's just that my neurons don't cope well with noise.