>This trend would make hearing aids not just target hearing impaired people, but also individual with normal hearing. For example, features such as protecting your ears against a sudden loud noise, silencing a loud restaurant so you can have a quiet conversation or improving the audio of a soft speaker could be useful for everyone.

Amusingly this already exists, there are a bunch of ear muffs (and some in ear equivalents I think) that relay sounds from outside in that cut off when a threshold is reached. They're pretty much exclusively sold for use with firearms, I'd love to see them developed more to work better in a setting other than the woods and shooting range.