I don't think that permanent hearing loss is a symptom of dysautonomia. Hearing loss can be caused due to several reasons like damage to the inner ear, infections, otosclerosis, etc. But it is true that dysautonomia is connected to hearing loss. My sister who is suffering from dysautonomia. She also has migraine problem, stomach pain, breathing problem, mood swings and some hearing problems which are connected to her dysautonomia. Actually, here hearing loss is not a permanent one, but she has difficulty while hearing both low-frequency and high-frequency sound. Currently, she is using temporary open fit hearing aids as per the prescription of her audiologist in Toronto. If your hearing loss is connected to dysautonomia, then it can be cured with proper treatment unless you have an ear infection or related disorders. All the best.