1.
There are three types of microphones: condenser microphones, dynamic microphones, and ribbon microphones (rarely).
2.
Uses include: recording microphones, instrument microphones, interview microphones, conference microphones, voice microphones, test microphones, mobile phone microphones, KTV/performance microphones
3.
Signal transmission: wireless, wired
4.
Pointing characteristics: omnidirectional, cardioid, wide-cardioid, super-cardioid, gun-shaped, figure-8, stereo
