Also when Kirk contacts Kruge earlier (“As we say on Earth, c’est la vie”), his voice comes through quite distorted on the Bird of Prey’s bridge. Either it’s interference from the decaying planet, or Klingon communicators are just garbage.The Kruge imitation could only have worked .if Maltz didn't recognize the voice in amongst the background din of wind and other insignificant things like the planet breaking up as Kirk's impression of Kruge misses by about an octave or so. But that background noise would be considerable to the point that noise cancelation, etc, wouldn't be as effective.

I saw their channel once for a Doctor Who Dalek movie riffing. Wasn't my thing, but now you've piqued my interest.