I'll bet most earbuds with active noise reduction and equalization could be tweaked to provide augmentation similar to a hearing aid. The current algorithms fo

I'll bet most earbuds with active noise reduction and equalization could be tweaked to provide augmentation similar to a hearing aid. The current algorithms for active noise reduction are designed to suppress external sounds -- all they have to do is invert the logic and amplify external sounds. Just add EQ to make my wife's voice come in better.