I have been having an issue with my bluetooth calling for the last couple months. Sometimes when I am on a bluetooth call, recipients say they hear loud unbearable noises. I have heard they sound like anything from missiles being launched to Transformers noises. It seems the pitches of the sounds vary whether I am accelerating or regeneratively breaking (more acceleration equals higher pitch). I cannot hear the sound myself. I will hang up and call again, sometimes it is fixed immediately other times I have to hang up and call again until it goes away.
This happens maybe once a week or once every two weeks; does not happen all the time and is hard to replicate. It seems to be independent of the thermal system being active (happens whether I have AC on or off). Independent if I have my phone plugged in or not. Independent of whether I make or receive the call. I have a Galaxy S7 Active and had it happen with my previous phone as well. Has happened when going below 15 mph and also at freeway speeds.
I'm curious if it is related to the very high-pitched whining sound I hear when accelerating at somewhat low speeds?
I took it to the dealer about a month ago and of course we could not reproduce the issue. They had me unpair my phone from the car, delete the bluetooth devices, and resync (same steps on the phone itself). Unfortunately the issue has occurred several times since.
I have an appointment to drop off my car with the dealer today and I'm guessing they won't be able to reproduce the issue - it happens very randomly. Curious if anybody has had a similar issue/can take a guess at what the problem might be? Sounds like a poorly grounded connection/malfunctioning filter somewhere but I am no electrical engineer!
Note, this is on a 2016 Spark EV.
Issue seems to be similar to an issue that was on a 2012 Chevy Volt. Seemed to be a SW fix??
http://gm-volt.com/forum/showthread.php ... -bluetooth