Also because everyone now carries a computer in thier pocket with a very intelligent microphone and Bluetooth card. Anyone looking at hearing aids afresh today would start with that tech as the backbone.
There are wifi-based systems (like Sennheiser MobileConnect or Williams WAVECast), and my experience has been universally awful. The latency is so high that if you have any ambient hearing you get an echo that makes sound impossible to understand.
If you're ever considering installing one of these systems, please think again. Or at least trial it with a real situation, so you know what the experience will be like for the users.
There are wifi-based systems (like Sennheiser MobileConnect or Williams WAVECast), and my experience has been universally awful. The latency is so high that if you have any ambient hearing you get an echo that makes sound impossible to understand.
If you're ever considering installing one of these systems, please think again. Or at least trial it with a real situation, so you know what the experience will be like for the users.