At 15:10 19/01/99 +0530, you wrote:
>Hmm, I'm no smartie, but wouldn't a capacitor eliminate your voice as well,
>as it's an AC type thing? So you'd just get a DC current, or silence. Maybe

If the capacitor is a suitable value, it should attenuate AM radio
(probably above 100kHz) a lot more than audio (under 20kHz).  The reactance
due to the capacitance is 1/(2*pi*f*C).

Nigel