The smartphone just switches modes and adjusts the volume. AFAICT these modern hearing aids are doing something like dynamic EQ, based on frequency level detect

The smartphone just switches modes and adjusts the volume. AFAICT these modern hearing aids are doing something like dynamic EQ, based on frequency level detection. The programs that dynamically adjust the EQ levels are trained on test material and then the audiologist or the user can switch between programs and adjust the levels based on the user's hearing response curve. So what happens in real time on the device is fairly simple. AFAICT - someone please correct me if they know otherwise.