I use earphones to listen to sound on a portable computer. These are external ones,cans, (i.e.) not in ear/buds.
Plugged into the earphone jack of the computer.
They amplify the surround sound in the room, be it tv or conversation.
How do they do this ? Its disconcerting
ones,cans, (i.e.) not in ear/buds.
Try muting the mic on the laptop.
I'm sure they don't amplify the local sound. But it's possible the computer has a microphone built-in to it - many do. And perhaps you've got the mic turned on and perhaps it's feeding sound to the earphone output.
Do they do it when they aren't plugged into the computer? That would be clever but not impossible.
Otherwise check that the microphone is turned down in the computers audio mixer. You say it's a portable they almost invariably have builtin mics these days as wells a mic socket.
ones,cans, (i.e.) not in ear/buds.
Noise canceling gone wrong?
Well one assumes there is no internal mic on the puter and if there is that monitor incoming audio is turned off. Otherwise what you are hearing may well be akin to some kind of resonant effect. Brian
In message , fred writes
Probably not relevant but you can use a loudspeaker as a microphone. Someone with more knowledge may care to explain how:-)
>
Eh? Both a loudspeaker and a microphone are usually a magnet with a coil near it and attached to a diaphragm. Put one on an input and it will act as a mic, put it on an output it'll be a speaker.
This of course won't work with a carbon mic, or an electrostatic speaker!
Andy
ones,cans, (i.e.) not in ear/buds.
Nothing to do with microphones and speakers, but...
just plug it in
Moving coil speakers and moving coil mics are the same core mechanism. The main difference between the 2 is the size of cone/diaphragm. Moving coil sp eakers work as mics, but mics don't really work as speakers because the con e is so tiny, to hear anything you'd need to stick it in your ear.
AFAIK electrostatic mics do work
NT
They can actually go quite loud - certainly enough not so low you need to stick it in your ear.
Remember the original lanyard mics - you'll still sometimes see them on old TV progs? Just a bit bigger than your thumb. Moving coil RCA BK6.
One rather well endowed lady singist was wearing one concealed by her dress. Just before rehearsal, the sound man re-plugged it and spoke down it
'Coo, it ain't half hot in here'
rnal ones,cans, (i.e.) not in ear/buds.
Given your obvious level of expertise, I would be more concerned over who is watching you via the webcam.
MBQ
ones,cans, (i.e.) not in ear/buds.
Has Big Brother stopped using the screens for this nowadays?
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