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Weird noise from laptop speakers, sounds like russian radio loop? - Page 3

post #21 of 28
Quote:
Originally Posted by Aeonus View Post

Nope, nothing so far. I've kept volume quite high in case it comes back, so that I'd hear it.
Nope, the closest one is maybe 15-20 kilometres away. A colleague did think it could have been an over-flying aircraft, and Russia is our beloved neighbour, but that seems a bit far-fetched.
Shouldn't have FM radio, but it does have a 3G modem (no SIM card in it), bluetooth and WLAN up to 802.11n, 2.4 & 5 GHz. Again, none of those should receive radio like that.

Actually, all of those work on FM frequencies, but not in the FM frequency range of typical radio transmissions. Cellphones use FM frequency bands also. Any physical alteration of the antennae on any of these devices can change the frequency, or range of frequencies, that they recieve. However, even a physically damaged antenna on any of these devices wouldn't explain why your computer took a signal that was likely analog and began playing it back by default. I'm presuming it was analog because digital signals usually break down entirely by the time they have that much noise. However, some of these components do convert analog signals to digital data.

Now if we were to pursue this avenue further I would say that it is possible for an analog signal to be intercepted by a component and sent to the speakers if the component did not rely on any digital component between it and the speakers. Imagine, if it were a car stereo, that the amplifier in your stereo was picking up the signal and relaying it directly to the speakers, with no communication to the head unit. It is also theoretically possible that the signal was not FM to begin with, but shortwave. Shortwave signals regularly become so distorted (not noisy, just stretched) by atmospheric interference that they can no longer be picked up by a shortwave band receiver, even though the signal is more than strong enough. Since shortwave is at the bottom of the spectrum, typically stretched signals end up in the MF or HF bands, which contain AM and FM frequencies. The fact that this signal randomly appeared and then disappeared days later can bring up the idea that a russian HAM radio enthusiast had left a loop of his call signal playing, waiting for a reply and atmospheric distortion just happened to allow that frequency to play on certain devices in your area that were capable of relaying the signal directly to either a dedicated device (radio) or to a set of speakers as a direct analog signal. The only way to corroborate this theory would be to find someone else who has the same laptop with the same accessories and see if they heard anything similar during the time period, in your area. Even then it is possible that only your laptop was capable of receiving the signal due to some physical defect or abnormality caused by use, age, or manufacturer defects.
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post #22 of 28
Even after Ganf's post....it still seems a little creepy hannibalsmiley.png
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post #23 of 28
Ganf's post is indeed creepy. I had a microwave turn on randomly that was unplugged from the wall and its transformer (those who've lived overseas can remember those big bricks) when I was 9. I'd still like to know where that voice through your speakers came from though.

I have a CB radio in my Jeep, and I'll occasionally turn it on while I drive to listen for local traffic emergencies/warnings, and funny trucker chatter. Sometimes, however, I'll hear the strangest sounds, even the classic numbers being read out that seem to have absolutely no meaning whatsoever.
post #24 of 28
Hey guys,

Randomly came across this thread (was googling for a problem with my laptop speakers) and decided to help you solve the mystery (if it's not yet solved). I speak Russian, so listened to the recording and typed in the phrase I heard into Google. Here is what came up: http://orbiter-forum.com/showthread.php?s=135a722375a9d310c840136260492ccd&p=262572&postcount=18 . You are hearing the phrase that is transcribed at the 0:38 and 1:48 marks in the transcript.

Now -- why your laptop picked up the frequency of the Russian space agency -- I don't know. Going by the time stamp of your first post, it looks like you picked up this launch: http://www.nasaspaceflight.com/2012/08/russian-proton-m-launches-telkom-3-and-ekspress-md2/

Hope I helped.

Daniel
post #25 of 28
Your speaker is most likely Pushed/Pressed or dented.
Either way, this is the quickest way to solve it. (You will likely need to disassemble the laptop)

http://www.youtube.com/watch?v=rla5Wy1QBwo
post #26 of 28
Thanks for your advice. Turned out I had a faulty microphone that was generating static-y noise that sounded like radio interference (kind of static that you'd pick up between stations on shortwave). What was strange -- the static didn't stop when I just disabled the microphone in control panel, I had to physically unplug it from my laptop's (Lenovo X61t) motherboard.
post #27 of 28
Quote:
Originally Posted by yasvintus View Post

Thanks for your advice. Turned out I had a faulty microphone that was generating static-y noise that sounded like radio interference (kind of static that you'd pick up between stations on shortwave). What was strange -- the static didn't stop when I just disabled the microphone in control panel, I had to physically unplug it from my laptop's (Lenovo X61t) motherboard.

Interesting. I am glad you figured it out. smile.gif
post #28 of 28
Here I was hoping he was picking up secret Russian Military messages . biggrin.gif
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