What term refers to activities related to fixing and maintaining hearing aids?

The term that specifically refers to activities related to fixing and maintaining hearing aids is "hearing aid repairs." This encompasses the processes of diagnosing issues, replacing parts, and restoring functionality to hearing aids, ensuring that they work effectively for users.

In contrast, while "hearing aid modifications" pertains to alterations made to personal preferences or fitting adjustments, it doesn't imply the maintenance aspect. "Hearing aid support" generally refers to customer service or assistance provided to users regarding their hearing aids, which can include educational or troubleshooting information but does not specifically focus on the physical repair of the devices. "Device management," meanwhile, is a broader term that could include overall monitoring and care for hearing aids, but it does not specifically denote the act of repairing them. Thus, "hearing aid repairs" is the most accurate and precise term for fixing and maintaining hearing aids.