moving coil microphone one of the 3 major parts of sound system
1)what is the working principle of moving microphone
2)what is the energy transformation of this device?
Answers
A moving-coil dynamic mic is a transducer that converts sound waves into mic signals via electromagnetic induction. As the diaphragm moves, an attached conductive coil oscillates within a magnetic field. This induces an AC voltage across the coil, which is then outputted as the mic signal.
1.The dynamic or moving coil microphone relies on the fact that if a wire held within a magnetic field is moved then an electric current is induced. This is the same effect as seen in an electric generator and many other items. The dynamic microphone consists of a magnet, and a diaphragm to which a coil is attached.
2.Heat engines, such as the internal combustion engine used in cars, or the steam engine (Heat → Mechanical energy) Ocean thermal power (Heat → Electrical energy) Hydroelectric dams (Gravitational potential energy → Electrical energy) Electric generator (Kinetic energy or Mechanical work → Electrical energy)