<prompt> Most common cause of SNHLLabyrinthitisPresbycusisMenieres diseaseVestibular Schwannoma  <response>: Presbycusis - Most common cause of SNHL. AW physiological aging process in the ear Bilateral slopping curve Usually manifests at the age of 65 years, old age but may do so early if there is a hereditary predisposition, chronic noise exposure or generalized vascular disease. 