What component is NOT part of a dynamic microphone?

A dynamic microphone operates based on the principle of electromagnetic induction. It consists of several essential components, including a diaphragm, a coil, and a magnet.

The diaphragm is a thin membrane that vibrates in response to sound waves. Attached to the diaphragm is the coil, which moves within the magnetic field created by the magnet when the diaphragm vibrates. This movement induces an electrical current in the coil, creating the audio signal that the microphone captures.

In contrast, a battery is not a component of a dynamic microphone because dynamic microphones do not require external power to operate. Unlike condenser microphones, which utilize an active electronic circuit that relies on a battery or phantom power, dynamic microphones generate their electrical signal purely from the mechanical movement of the diaphragm and coil in the magnetic field. This characteristic makes dynamic microphones particularly robust and ideal for various live sound applications without the need for batteries.