What is a microphoneWorking principles- The moving coil principle- Advantages and disadvantages- The electrostatic principle- Advantages and disadvantagesSame principle - different name- The ribbon microphone- The electret microphone- The RF capacitor microphoneImpedancePhasePolar response- Omni-directional- Bi-directional- Uni-directional- The ‘other’ cardioidsSpecialist microphones- Highly directional microphones- Boundary microphones- Radio microphones- Underwater microphones