It's my understanding that the "dynamic" microphones are really capacitive microphones. This is indeed the design that sound studios use. The "standard" microphones are based on the carbon resistor principle used by Alexander Graham Bell. While they are very rugged, they don't offer the highest sound quality.

There are other factors that affect the quality of the transmission. One factor is the percent of modulation, which if not set properly causes the received sound wave to be distorted by "clipping" (it would have flat tops if seen on an oscilloscope). Percent modulation is usually best set by an avionics tech.

But another sound quality factor is the position of the microphone with regard to the pilot's mouth. If you speak directly into the microphone you can distort the sound - it's better to speak across the microphone. The microphone position is of course under your control, so it may be quite easy to improve your transmissions.

-John