cooldevo wrote:Geohazard wrote:I get a lot of painful feedback. Electricity and magnetism go hand in hand. As the mic moves through the magnetic field, it creates an electrical current, which results in screeches.
Won't derail the thread, but there should be ways to negate/minimize that effect in a closed and mostly controlled environment (your helmet).
It can vary by microphone type, sensitivity/directionality (or modding it to be even more directional), and the magnets and how they are mounted. If both are relatively fixed points (your mouth and helmet should stay pretty similar distance apart), should be able to avoid the problem, although might take a bit of tweaking. An even further enhancement would be a PTT system that would help even more, as I don't like "always on" microphones.
I've tried the PTT system, it shorted out. The problem that I see with every bit of electronics, fans, mics, etc... in the close helmet is that they eventually short out, especially during the middle of a long troop, where I am in the helmet for hours at a time, and therefore condensation covers everything inside my helmet in a layer of wet. There is also not a lot of clearance inside my helmet for fans, etc... (not to mention the difficulty of mounting such on a convex surface) due to my large gob. I use a thin mylar visor because it blocks view inside the helmet, but necessitates easy removal, because they break down fairly quickly and need replacing. Tape peels away quickly due to the moisture, and therefore tiny disc magnets are more efficient. I don't use a wireless mic, due to the bulkiness of the setup.
I can't be the only one who deals with these sets of challenges.