Abbott Hearing Aid Centers in San Carlos has fitted custom amplification devices from its Jackson Drive suite in San Diego since 1978, making it one of the region's longest-running independent hearing practices. Owner and lead hearing instrument specialist Julianna Lung has directed patient care at the 92119 location for more than fourteen years, conducting audiometric evaluations, otoscopic examinations, and live speech mapping using probe microphones that measure real-time amplification response inside the ear canal. Geriatric patients managing concurrent sensory decline pair hearing evaluations with vision care at Allied Gardens Family Optometry, which handles the optometric side of dual sensory loss common in the Lake Murray Boulevard corridor's older residential population. The clinic is an authorized Starkey dealer and programs rechargeable Bluetooth-enabled hearing aids that pair directly with smartphones for phone calls, music, and television audio streaming without an intermediary device. Repair services cover all major manufacturer platforms, and Lung calibrates existing devices on-site rather than shipping them to a factory. Custom hearing protection molds — including musician plugs in ER-9, ER-15, and ER-25 attenuation ratings — are cast from silicone impressions taken in the same appointment as the initial hearing screening. The suite sits on Jackson Drive a half-mile south of the Cowles Mountain trailhead, within the San Carlos commercial strip that runs along Lake Murray Boulevard. CareCredit financing splits device costs into monthly installments, and Lung runs a loaner program so patients are never without amplification during extended repairs. The BBB-accredited practice operates as a sole proprietorship under Lung's direct oversight, with every fitting verified through speech-in-noise testing before the patient leaves. Older adults transitioning through assisted-living evaluations at La Mesa Elder Care in San Carlos represent a referral pathway where hearing capacity directly affects care-level placement decisions. The live speech mapping protocol measures aided versus unaided speech recognition across low-frequency and high-frequency word lists, producing a percentage-of-hearing-loss score that determines whether a monaural or binaural fitting is clinically indicated.