I'm not trying to be a dick, and I've appreciated your posts in the past on various possible Ménière's treatments… but… my take on this is if you're hard of hearing, this will help with listening to things originating from your phone. The audio has to be stored on the phone or passed through it to get to the headphones. I don't see any evidence that these headphones can be used independently from a phone. So, you'd have to use a phone's microphone to capture audio. I assume that you'd have to buy or subscribe to a third party's hearing aid app (the Sentien app doesn't seem to be a hearing aid app). I tried one of these apps once, and they specifically say not to use a Bluetooth device. I tried a Bluetooth 5 device, and sure enough, there was a delay and an echo effect. There's a reason gamers still use wired keyboards and mice - because of the slight Bluetooth lag. I fear that these headphones are no more of a hearing aid than any other bone conducting headphones.