On Oct 16, 8:33 am, "Paul Stamler" <pstamlerh...@pobox.com> wrote:
> "D" <t...@bk.ru> wrote in message
>
> news:1192480473.647816.62910@z24g2000prh.googlegro ups.com...
>
> > Hello!
> > A background (about 50hz) rumble appears in a sound from microphone.
> > Windows XP SP2.
> > I tried two headsets (which surely are good). The rumble decreases if
> > I touch the computer case. I checked the inside of the case, did not
> > find any improper contacts. The sound card is Creative sound blaster
> > live ct4830. I tried the latest Microsoft and Creative drivers. The
> > Creative driver does not output sound from microphone to speakers at
> > the same time, but only from a recording from the microphone. How to
> > prevent the rumble?
>
> By "rumble", do you mean hum? Where are you located? What's the line
> frequency where you live?
>
> If the "rumble" isn't hum, then it could be a mechanical resonance of the
> computer's case with one of the fans. One way to reduce this is to put
> adhesive pads on the metal case; they're usually sold for dampening rattles
> in cars.
>
> Peace,
> Paul
Thanks Paul for your suggestion!
The line frequency where I live is 50 Hz. I live in Russia.
By "rumble", I mean hum.