Dynamic microphone

Definition

A dynamic microphone is a type of microphone that operates based on electromagnetic induction, using a diaphragm attached to a coil of wire placed within a magnetic field. This design makes dynamic microphones robust, versatile, and capable of handling high sound pressure levels, making them ideal for live sound applications and recording environments. Their ability to reject background noise and feedback also contributes to their popularity in various audio settings.

5 Must Know Facts For Your Next Test

1. Dynamic microphones are often used in live performances due to their durability and resistance to moisture and temperature changes.
2. They have a limited frequency response compared to condenser microphones, but they excel in capturing loud sounds without distortion.
3. The design of a dynamic microphone typically includes a moving coil mechanism, where sound waves cause the diaphragm to move within a magnetic field, generating an electrical current.
4. Dynamic microphones are less sensitive than condenser microphones, making them suitable for environments with high sound pressure levels, such as concerts and studio recordings.
5. Common examples of dynamic microphones include the Shure SM58 and SM57, both of which are staples in live sound and studio settings.

Review Questions

• What are the main advantages of using dynamic microphones in live sound applications?
  • Dynamic microphones are favored in live sound settings due to their rugged construction and ability to withstand high sound pressure levels without distortion. They also have excellent feedback rejection, allowing performers to move around freely without causing unwanted noise. Additionally, their durability makes them reliable for various environmental conditions, such as outdoor performances or venues with fluctuating temperatures.
• Compare the operating principles of dynamic microphones with those of condenser microphones.
  • Dynamic microphones operate on electromagnetic induction, where sound waves move a diaphragm attached to a coil within a magnetic field to produce an electrical signal. In contrast, condenser microphones utilize an electrically charged diaphragm that varies in capacitance to generate audio signals. While dynamic microphones are more robust and better suited for high sound pressure levels, condenser microphones are more sensitive and capable of capturing finer details in sound, making each type suitable for different applications.
• Evaluate the impact of frequency response on the choice between dynamic and condenser microphones in studio recordings.
  • Frequency response is crucial when choosing between dynamic and condenser microphones for studio recordings. Dynamic microphones typically have a narrower frequency response, making them better suited for capturing specific instruments or vocal ranges without picking up excessive ambient noise. On the other hand, condenser microphones have a wider frequency range and higher sensitivity, allowing for more detailed recordings of complex sounds. Thus, understanding the frequency response can help sound engineers select the right microphone type based on the recording needs and desired sound characteristics.

Related terms

Condenser Microphone: A type of microphone that uses an electrically charged diaphragm and backplate to convert sound waves into electrical signals, known for its sensitivity and ability to capture high-frequency sounds.

Phantom Power: A method of delivering power to condenser microphones through the microphone cable, typically providing a 48-volt charge necessary for their operation.

Frequency Response:

The range of frequencies that a microphone can pick up and reproduce, which is crucial for understanding how well a microphone will perform in various audio applications.