solidstatemind said:
RE: the weird sound:
It's not really cellphone interference... well not directly, anyway. It's actually Bluetooth interference. [ ... ]
I strongly doubt this is correct.
Cell phones have been generating that characteristic RFI buzz for years, long before Bluetooth achieved wide adoption. Further, Bluetooth operates over the 2.4GHz band, the same bands as 802.11[bgn] wireless networking. If transmissions over the 2.4GHz band were causing that buzzing, we would have noticed it the moment we put a Wireless Access Point in our homes.
I often hear this buzz right before I receive a call or a text. My personal guess is that there's a common transceiver component that everyone uses (because it's cheap and it "works") that spills a lot of noise into a band that amplifiers can pick up at close range. If the Federal Communications Commission were actually fulfilling its charter, this sort of thing would have been investigated and fixed by now.