Mobile phones and speakers

[chris_uk_83]

Here's one for you:

What causes that bip bip de bip bip de bip bip de bip when your mobile phone is close to your speakers and you recieve a text message?

I'd look it up but it's late and I'm feeling lazy. Also it'll be informative for anyone who does look it up.

I'm thinking off the top of my head that the microwaves coming to your phone somehow induce a current in the speaker wires, which causes the noise. I may be wrong.

[Hookah Smoking Caterpiller]

its something to do with a radioactive part in the phone and the way the signal alters the rays emitted by it... I did it in science three years ago, so this could all be wrong

[chris_uk_83]

Turns out I was right after all. It's simple electromagnetic induction, the speaker wires act as ariels and have a current induced in them by the oscillating magnetic component of the radio wave which is coming out of your phone as it tries to communicate with the network.

[Oglethorpe1983]

Turns out I was right after all. It's simple electromagnetic induction, the speaker wires act as ariels and have a current induced in them by the oscillating magnetic component of the radio wave which is coming out of your phone as it tries to communicate with the network.

In other words... magic

[Simetrical]

the speaker wires act as ariels

You mean like this?

[Legionary Jezza]

You mean like this?

[Sphere]

I'd still do her.

[Ramashan]

Yeah, and its highly annoying if your an audio guy trying to get speakers on public panels to turn their phones off before they go on stage. I believe the rf interference from cell phones through speakers is some of the most annoying noise one can hear.

Luckily, people are now making a reduction item that gets attached to pin 1 of your XLR cable to remove this problem. Don't know how well it works and probably best to just try and get the people to turn their phones off. Not to vibrate or sleep, but off.

[Kanaric]

sometimes i hear that even though there is no activity on a phone, strange.

[chris_uk_83]

I'd still do her.

How? Look closely at her anatomy.

sometimes i hear that even though there is no activity on a phone, strange

Because your phone communicates with the network sometimes, to check it's still there. That's how it knows how many bars you have.

[rathelios]

How? Look closely at her anatomy.

The same way as any other fish. She spawns her eggs and you fertilise them in the water.
A quick search reveals that people have been thinking way too much about this problem for way too long.
http://en.wikipedia.org/wiki/Mermaid_problem