weird noise

[1337dingo]

ok i've alwase known my phone interfers with my speakers some how when i get a message or sumthing but .. why?? what actully interfears with what?

 

[deanj20]

From HowStuffWorks:

Most of us experience electromagnetic interference on a fairly regular basis. For example:

• If I put my cell phone down on my desk near the computer, I can hear loud static in my computer's speakers every time the phone and the tower handshake. In the same way, my car's tape player produces loud static whenever I make a call on my cell phone.
• When I dial a number on my home's wireless phone, I can hear the number being dialed through the baby monitor.
• It is not uncommon for a truck to go by and have its CB radio overwhelm the FM station I am listening to.
• Most of us have come across motors that cause radio or TV static.

None of these things, technically, should be happening. For example, a truck's CB radio is not transmitting on the FM radio bands, so my radio should never hear CB signals. However, all transmitters have some tendency to transmit at lower power on harmonic side bands, and this is how the FM radio picks up the CB. The same thing holds true for the wireless phone crossing over to the baby monitor. In the case of the cell phone affecting the computer's speakers, the wire to each speaker is acting like an antenna, and it picks up side bands in the audible range.

These are not dire problems -- they are just a nuisance. But notice how common they are. In an airplane, the same phenomena can cause big trouble.

 

[epidemik]

It's caused by the electromagnetic radiation coming out of GSM-enabled phones when they communicate with the tower.
The waves carry information by varying the different properties of the waves (such as amplitude, frequency and phase). They induce a current when they hit a conductor.
Shielded cables/equipment supposedly reduces or eliminates it - not too sure about that though, just what I've heard.

 

[1337dingo]

ahh kk thx guys