Hyperacusis and phonophobia also involve sound, they are not the same and they are not the same as misophonia. A person suffers hyperacusis when common sounds seem louder than normal. This person can have a bad response to the sound of a vacuum cleaner or meowing cat. Other conditions such as migraine and tinnitus can lead a person to hyperacusis. And hyperacusis can be a result of phonophobia.