Hi @lylynn
I’m pretty confident on the first one (the stereo streaming), not so confident on the second.
I’m confident on the first because I don’t think there’s any other way it can happen. It’s inherent in the A2DP protocol. The source sends out both channels in the one stream which is decoded by the destination device. In headsets, this is seamless because both sides are connected by some kind of wire. It’s one of the reasons why headphones and physically connected buds have much better battery life. There’s no need for transmission to the other bud.
Btw, my Oticon aids show up in my Android phone. This has nothing to do with audio streaming. That’s a LE connection which is used by the Oticon app to control the aids.
The pdf you linked to includes the following:
Proprietary protocols for connecting to Roger
technology, streaming from the TV Connector and
binaural ear to ear data and audio exchange with
Binaural VoiceStream Technology.
So the facility for one aid to ‘exchange’ audio with the other is there.
As for the second, you may well be right. The Phonaks use the hfp (hands free profile) for calls, which from what I can tell uses a mono input and mono output. So you can’t use the microphone AND have high quality audio but I haven’t seen anything to suggest that they can’t be used at the same time…
I’ll do a bit more Googling and amend my post. If anyone wants to chime in, please do.
Edit: Edited the section on Classic Bluetooth.
Now reads: Phone calls use hfp (hands free profile). The microphone in one of the aids picks up the
user’s voice, enabling hands-free communication.