mic headphones problem
rick_knight at rlknight.com
Wed Mar 19 20:51:10 UTC 2008
Jon Grant wrote:
> Hi Karl,
> Thanks for the reply.
> On 19/03/2008, Karl Larsen <k5di at zianet.com> wrote:
>> Jon Grant wrote:
>> > I've got a very bizarre situation. Two pairs of headphones which work
>> > perfectly in another PC do not work with my Dell Laptop Inspiron 1300
>> > mic jack port. but bizarrely if i plug headphones into my laptop jack
>> > I can speak into the headphone and be heard on voice chat etc..!
>> > so anyone know the real Mic not work with the port..? Maybe some
>> > stereo configuration? although mic has stereo jack...
>> > Any tips appreciated.
>> > Kind regards, Jon
>> First, you talk about your Headphones working on one computer but
>> not another. Then you talk about the Mike jack that has a 3 pin jack on it.
>> Please tell us what is not working. I assume the thing your using is
>> a compination earphone-mike like I have, and it has two plugs, one for
>> earphone one for mike.
>> Now what is wrong?
> yes, you are right, has two plus like you say.
> Mic in other PC works fine. Other Mic in other PC also works fine.
> Mic in Dell Laptop with Kubuntu does not work.
> Headphone plugged into Mic socket on Dell Laptop with Kubuntu does
> work as a mic.
> So I think there is a configuration of my Dell Laptop Mic port that
> has a problem.. as speaker can be used as Mic in the port..
> Thanks for your help
A speaker, of any kind, including the speaker in a set of headphones,
can act as a microphone. The headphone speaker will have different
impedance and voltage characteristics, so it could be just putting out a
higher level signal than the mic plugged into the same mic connector.
Check the mixer gain for Mic. If I recall, you can turn on 20db gain in
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