Sonus Hearing Care Professionals on Chula Vista's Third Avenue provides audiological evaluations, hearing aid fitting, and device repair as an authorized Starkey dealer within the Third Avenue Village district. The practice coordinates with referring otolaryngologists including ENT Associates of San Diego - Chula Vista office to match diagnostic audiograms with appropriate amplification technology, fitting patients with Starkey's Edge AI platform and other digital hearing instruments. Operated under American Hearing Aid Center of the South Bay Inc., the office dispenses behind-the-ear, in-the-ear, and receiver-in-canal devices calibrated through real-ear measurement verification. Community health networks along the Broadway corridor, including Chula Vista Family Health Center, serve as primary-care referral sources for patients presenting with age-related or noise-induced hearing loss. The fitting protocol includes real-ear probe microphone measurements, speech-in-noise testing, and 75-day trial periods to verify gain targets across multiple listening environments.