Thoughts on microphones.
In microphones, there are 3 things we want: Low noise, good frequency response, and low distortion.
Additionally, we want mics to be stable and not change behavior with time, temperature, humidity, air pressure, etc.
For low noise, a mic should have as little viscous flow / damping resistance as possible. Also, a big diaphragm will collect more sound. This conflicts directly with the desire for good frequency response. Most mics have their high-frequency response limited by membrane resonance, and damping resistance properly applied damps this and moves it to higher frequency, flattening the response curve. Also, for better high frequency response, smaller diaphragms are used.