The one linked above is an electret with an amplifier and an
integrated voltage regulators. The gain is adjustable and can be
adjusted for each installation. No noise cancellation and apparently
it has a circle directional characteristic.

The other one (ho M5) is similar (amplified electret) but I don't
believe the amplifier is adjustable. 400-20K frequency response and
600ohm. Don't have any info on its spacial response model.

BTW, I think I found the problem with my mic to be a broken power
lead. I will test it and see how it goes. But looks like now I have a
couple of sources if I need to replace it.

MA

On Jan 4, 11:12*pm, Three Uniform wrote:
Hi Morteza
I will be very interested to hear your transmissions this spring/
summer.
If it works well, I will consider to install one too to get rid of the
boom mic.

Is there any technical info about directional sensitivity, noise
cancellation and/or other properties ?

3U