In SAS, we have several types of microphones, which are listed below. These microphones are a variety of types and have a variety of pickup patterns.

The theaters at SAS own dynamic microphones, condensers, and electret-condensers. They all work differently.

Dynamic Microphone: The sound hits the diaphragm. The coil inside the microphone begins the vibrate slightly. A magnet surrounds this coil (but is not attached to it). An electric charge builds up in between the coil and the magnet. This charge is carried out by a wire running through the microphone.

Condenser Microphone: The sound hits the diaphragm. A phantom power of +48 volts runs to an electrode inside the microphone. An electric field builds up in the space between the diaphragm and the electrode. This electric charge is carried out by a wire running through the microphone.

Electret-Condenser or Radio Microphone: This is a condenser microphone attached to a transmitter. The transmitter sends the electric charge to a receiver through a radio signal. The receiver then sends charge to the mixing desk or another designated place.

There is also great variety in the pickup patterns of each microphone. There are 5 basic pickup patterns microphones in SAS use.

  • Unidirectional - only picks up sound from one direction, straight in front of it
  • Bidirectional - Picks up sound from two directions on opposite sides of the microphone
  • Omnidirectional - Picks up sound from all directions
  • Cardioid - Shaped like an upside-down heart, this pickup pattern encompasses the area directly in front of the microphone and some of the side areas.
  • Hypercardioid - Similar to the cardioid pickup pattern, only with an extension in the downward direction as well.
  • May 26, 2005