Top 5 Reasons to Upgrade Your Hearing Aids | ReSound One. Doctor Cliff Olson, Audiologist and founder of Applied Hearing Solutions in Phoenix Arizona, discusses the five reasons why you may need to upgrade your hearing aid technology. More information about upgrading your hearing aids: https://hearingup.com/videos/best-way-to-upgrade-your-hearing-aids For a vetted hearing care provider outside of Phoenix, visit: https://hearingup.com For Dr. Cliff's clinic in Phoenix, visit: https://appliedhearingaz.com