What screening is necessary if I want to protect a domestic-grade
electret microphone from the RF coming from a cellphone which is in use?

I sometimes hear radio or TV news broadcasts which still get cellphone
interference so I would guess it is not all that easy to provide a
reasonale level of screening.

On the other hand, you can get a cheap electret microphone designed to
be worn in the ear (as a phone-recording microphone) which is remarkably
resistent to cellphone RF.
http://www.teknikmagasinet.se/prod/s...png/290080.png

How do I make a domestic electret microphone capsule with its co-ax
microphone cable (cdonsisting of shield and one core) resistent to
cellphone RF?


Moz

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Note: xposted to 4 relevant groups (GKSA limit) = alt.cellular
alt.engineering.electrical sci.electronics.design uk.telecom.mobile