I didn't see any sign of a telecoil in either device. It's been an increasing problem for venues in recent years as the AFILS infrastructure can often be expensive to install and maintain, yet perhaps now only the minority of hearing aid users can really still benefit from it.
Perhaps ironically, the early behind the ear hearing aids used to give the user full control over mic or telecoil via the simple M/T switch. Modern hearing aids however appear to require the option to be enabled/disabled often by the audiologist during configuration. Often it appears it is left disabled though to avoid the problems of nuisance spill from poorly designed and installed perimeter loop systems.
Alternative solutions tend to create more problems that they solve be it due to the additional IR/RF receivers required or the audio streaming latency through Wi-Fi and/or Bluetooth comms on a smartphone to the hearing aid.
Not sure that I would enjoy my ability to hear to be mandated by the built-in obsolescence of smartphones/apps though.
The Viennatone earpiece looked rather familiar. I recall an old office audio transcription machine teardown I did in the early 80's using something almost identical (transducer, plugs, cable) except that it was clipped onto a stethoscope transcription headset instead of the ear moulding as seen here.
Found this regarding the dummy battery:
"...This hearing aid was rather unusual in that it could use either 1 or 2 batteries depending how much power you needed.
If you only wanted to use 1 battery (left), then you used a dummy battery (right) in the other slot as the two battery slots were hooked together in series..."
It's probably beyond my skill set for me to develop single handed, but with a platform like e14 Community behind us, we should have a good starting point!
I'm in my 30s, but I already think about all the times in my younger years I didn't protect my senses (eyes from arc, ears from live music etc) and cringe slightly.
Another great teardown.
It is amazing how the technology continues to progress on these devices.
Great episode! It aligns well with the element14 Essentials: Connectors VII module. I love your call to action. It's way beyond my skill set, but very noble.
My Dad wears two hearing aids and has for decades. Too many hours under the headphones - compliments of the U.S. Navy. It's certainly made me more engaged in hearing protection.