Hi...my 22 year old son had a wierd experience yesterday while he was at work. He felt a really loud sound come from within his head almost like loud voice or a loud bang he had trouble describing it. It was short lived and passed quickly but caused him some anxiety because it was rather frightening. It happened twice during the day and once more in the evening. Other than this he is a healthy 22 year old.
Hello dear Your narration seems to be related to auditory hallucination or temporal Lobe seizure. Such a complaint is usually not of many concerns and may abate by itself but if it persists or additional features develops then a consultation with neurologist will be safe. Your son may require some investigation like EEG and imaging of brain if symptoms persists. Hope you found the answer helpful. Wishing you and your family good health.  Chat Doctor.