The definition of hyperacusis put forth by Jastreboff and Hazell has been widely accepted. They stated that hyperacusis is an abnormal sound sensitivity arising from within the auditory system, either peripheral or central. This may explain why there should be some abnormality in the audiological examinations or investigations noted with true hyperacusis
Phonophobia is defined as a persistent, abnormal, and unwarranted fear of sound. Often, these are normal environmental sounds (e.g., traffic, kitchen sounds, doors closing, or even loud speech) that cannot under any circumstances be damaging. Phonophobia may also be related to, caused by, or confused with hyperacusis, which is an abnormally strong reaction to sound, occurring within the auditory pathways, in levels that would not trouble a normal individual
The poster stated nothing in regards to a migraine, therefore as a coder given only a diagnosis we cannot stretch to reach something that it might also be. perhaps with additional information the answer would be different but a diagnosis out of context can only be interpreted one way.