ewhac said:
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.
Believe what you wish. I can't change your mind. Note, however, that your 'deduction' (which is flawed because Bluetooth uses frequency hopping - at 1,600 hops per second- to hop over the entire 2.4 GHz band. 802.11b, on the other hand, uses direct sequence and only occupies approximately one third of the 2.4 GHz band. As a result, Bluetooth hops all over 802.11b transmissions) is no more valid than me saying, oh, that I have studied this artifacting problem for a major company, specifically in regards to when this phenomena is experienced using bluetooth
hardware, and not just cell phones-- at least in this forum. We're not really presenting scientific data here.
It was more of an interesting aside anyway. If it's that important to you; fine- you're 'right'. It's not worth arguing about. Personally, I'll say no more on the subject.
winter2 said:
What he said. I used to get that interference sound when I was in college back in.. erm... 94 or so. It always preceded a call or a text message.
See above. Although I find it interesting that you were using SMS in '94... talk about an early adopter.