Dynamic microphone

Definition

A dynamic microphone is a type of microphone that uses electromagnetic induction to convert sound waves into electrical signals. It is known for its durability, ability to handle high sound pressure levels, and its suitability for live sound applications. Dynamic microphones are often preferred in environments where reliability and performance under various conditions are essential.

5 Must Know Facts For Your Next Test

1. Dynamic microphones are less sensitive than condenser microphones, making them ideal for high-volume sources like drums and guitar amplifiers.
2. These microphones are built with robust materials, allowing them to withstand rough handling and harsh environments, making them popular for live performances.
3. Dynamic microphones typically have a simpler design compared to condenser microphones, resulting in lower production costs and ease of use.
4. The sound capture of dynamic microphones may be less detailed compared to condenser mics, but they excel in rejecting background noise due to their directional polar patterns.
5. Dynamic microphones require no external power source, making them versatile and easy to use in a variety of settings.

Review Questions

• Compare dynamic microphones with condenser microphones in terms of their construction and application.
  • Dynamic microphones use electromagnetic induction with a diaphragm attached to a coil moving within a magnetic field, while condenser microphones use capacitance changes due to sound pressure on a diaphragm near a backplate. This structural difference makes dynamic mics more rugged and suited for high-pressure sound sources like live vocals or instruments. In contrast, condenser mics are more sensitive and favored for studio recording due to their ability to capture finer details in sound.
• Discuss how the polar pattern of dynamic microphones influences their effectiveness in live sound settings.
  • The polar pattern of dynamic microphones, often cardioid, significantly influences their effectiveness by allowing them to focus on sound from the front while rejecting noise from the sides and rear. This makes them ideal for live settings where background noise is prevalent, as they can isolate the intended sound source more effectively. The directional nature also helps prevent feedback issues that can arise when using multiple microphones on stage.
• Evaluate the advantages of using dynamic microphones in challenging audio environments compared to other microphone types.
  • Dynamic microphones have several advantages in challenging audio environments due to their durability and resistance to humidity and temperature changes. They can handle high sound pressure levels without distortion, making them suitable for loud instruments like drums or electric guitars. Additionally, their lack of need for phantom power enhances portability and ease of setup. These features make dynamic mics reliable choices for both studio recordings under varied conditions and live performances where equipment may be subjected to rough handling.

Related terms

Condenser microphone: A condenser microphone is a type of microphone that uses a diaphragm placed close to a backplate, creating capacitance changes to convert sound into an electrical signal. They are often more sensitive than dynamic microphones and are commonly used in studio settings.

Polar pattern: The polar pattern describes the sensitivity of a microphone to sound coming from different directions. Dynamic microphones typically have cardioid polar patterns, which pick up sound from the front while rejecting noise from the sides and rear.

Phantom power: Phantom power is a method of delivering power to condenser microphones through the same cable that carries the audio signal, typically requiring 48 volts. Dynamic microphones do not need phantom power as they generate their own signal.