Some info on Bluetooth from Quora:
“ Q: Is Bluetooth a line-of-sight technology? I notice I can disrupt the reception of signal between my Bluetooth speaker and tablet just by standing in the doorway between 2 rooms. Is that normal?
Bluetooth has a range normally less than 10 metres in clear space, but this can be reduced considerably in a building. Reflections from walls, doors, even people can cause problems.
It normally hops between different frequencies, and if you move around the effects of reflections can make certain frequencies drop off requiring some re-profiling of the connection. This takes place automatically, but can make audio choppy for a short while of may even interrupt it completely.
If I have my laptop in the sitting room, and I go into the next room, the kitchen, to make a brew then the audio on my headphones can get very choppy even though I am only six or seven metres from the laptop.”
**So, I have been out of State for a while and in a house with no wifi, so I have been using cellular and bluetooth and bluetooth is very limited. If I put my phone on a counter in the living room and then walk around the corner to the kitchen, blocking direct line of sight, the bluetooth cuts out, so I have 25% in my left ear and no sound in the right. As soon as I can see the phone, the bluetooth rights itself and comes back. If I go out to the woodshed and go around the corner, the aids cut out again. Upon re-entering, the sound returns. I am not talking much distance here at all, just blocked by a wooden wall and no longer in line-of-sight. The other issue: sound bouncing from left to right and back when walking outside is no longer happening after the update. Yeh!