Dynamic microphone

Definition

A dynamic microphone is a type of microphone that uses electromagnetic induction to convert sound waves into electrical signals. It consists of a diaphragm attached to a coil of wire placed within a magnetic field. This design makes it durable and ideal for live sound applications, as well as recording environments where clarity and robustness are essential.

5 Must Know Facts For Your Next Test

1. Dynamic microphones are particularly well-suited for high sound pressure levels, making them great for live performances and loud sound sources.
2. They typically have a limited frequency response compared to condenser microphones but excel in capturing vocals and instruments in noisy environments.
3. Dynamic microphones are known for their durability and resistance to moisture, which makes them less prone to damage from physical handling or environmental factors.
4. These microphones do not require external power, which simplifies their setup and makes them more versatile in various situations.
5. Popular models of dynamic microphones include the Shure SM58 and SM57, both of which are industry standards for vocals and instrument miking.

Review Questions

• How does the construction of a dynamic microphone contribute to its performance in live sound applications?
  • The construction of a dynamic microphone, which includes a diaphragm attached to a coil within a magnetic field, allows it to effectively handle high sound pressure levels without distortion. This makes dynamic microphones ideal for live sound applications where loud vocals and instruments are common. Their durability also means they can withstand the rigors of frequent transport and use, making them reliable choices for performers and audio engineers.
• What advantages do dynamic microphones offer over condenser microphones when used in certain recording environments?
  • Dynamic microphones offer several advantages over condenser microphones in specific recording environments. They are generally more rugged and resistant to moisture, making them ideal for on-stage performances where humidity or accidental spills can occur. Additionally, they excel at rejecting background noise due to their limited frequency response and polar patterns, allowing them to capture clear sound even in loud settings. This makes them preferable for miking loud instruments like drums or guitar amplifiers.
• Evaluate the role of frequency response and polar patterns in determining the effectiveness of dynamic microphones in different audio scenarios.
  • The effectiveness of dynamic microphones in various audio scenarios is largely influenced by their frequency response and polar patterns. Dynamic microphones typically have a narrower frequency response compared to condensers, making them more suitable for certain applications like live vocals where clarity in the mid-range is crucial. Their polar patterns, often cardioid, help isolate the desired sound source while minimizing pickup from surrounding noise. This combination allows dynamic microphones to excel in environments with high ambient noise, ensuring that the primary audio source is captured clearly without interference.

Related terms

Condenser Microphone: A condenser microphone is a type of microphone that uses a diaphragm placed close to a backplate to create an electrical capacitor, requiring an external power source to operate.

Frequency Response: Frequency response refers to the range of frequencies a microphone can effectively capture, influencing its ability to reproduce sound accurately.

Polar Pattern: Polar pattern describes how sensitive a microphone is to sound from different directions, affecting its performance in various recording and live sound situations.