Has anyone been able to improve their sensorineural hearing loss naturally? I want to hear better without(and with) hearing aids, especially in the high frequencies. What kinds of herbs or medicines can do this? Also what kind of hearing exercises should I do?

IMPOSSIBLE!
once the hair cells are damaged they are damaged. there is no magical-medicinal cure for a sensory/ neural hearing loss.
buck up and get your self some hearing aids. if you have a high frequency loss. make sure they have directional microphones and at the very least 8 channels so the audiologist has greater programming ease.