Ironically, Apple keeps rather quiet about this feature but whether you're hard of hearing or just in a loud place, Live Listen is remarkable. AppleInsider explains how to get it set up and use it.
Since 2014, Apple has included a little-known feature in iOS called Live Listen that allows an iPhone or iPad to serve as a remote microphone for an MFI-compatible hearing aid. In iOS 12 and later, ...
In iOS 12 Apple has updated its innovative Live Listen feature to work with AirPods. Since 2014, people with hearing issues could enable Live Listen to work with their hearing aids, turning the iPhone ...