Andrew VK3BFA wrote:


Take a microphone with a frequency response 30Khz, and an amplifer.
Monitor the amp's output with a scope. bg

Agree. Even a bog standard electret for $1 will do it - probably
wouldn't even need an amplifier......if you want to get sophisticated,
put it in the end of a piece of 30mm plastic pipe - voila, directional
microphone....

The alternative is you are just being paranoid......but I know you
know that anyway...

Andrew VK3BFA.


Hello Andrew,

Do you know of any freq response curves on the web for the garden
variety electrets? I've looked and haven't found any.

Thanks,

Chuck NT3G

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