As of May 2021, Dr. Maria Lundquist has retired and selected Dr. Allison Holtz-Caspar of Chesapeake Hearing Centers to continue the hearing care of her patients in the same Rockville location. Graduate Clinician Allison HoltzDr. Lunquistâs patients in the Rockville area will still have access to the quality care they have come to expect from Preferred Audiology Services. Dr. Allison Holtz-Caspar and her team are dedicated to making you feel welcome and comfortable during this transition in your care. Chesapeake Hearing Centers is the oldest private practice audiology group in the state of Maryland, and our mission is to treat each patient as we would want to be treated.