What happens when an audio loop occurs between the speaker and the microphone attached to it?

• A. Hum
• B. Feedback
• C. Crosstalk
• D. Noise

Answer: (B)

When a microphone picks up the sound coming from its own speaker, the audio is amplified and sent back through the system, creating a loop. This closed path makes the signal reinforce itself each time around, producing a rising, continuous tone known as feedback. It’s a very specific problem tied to the mic-speaker loop, not just any unwanted noise. Hum is a steady low-frequency buzz from electrical issues, Crosstalk is one channel leaking into another, and Noise is any general random unwanted sound. To prevent it, lower the mic gain, move the mic away from the speaker, switch to a more directional microphone, or use equalization/feedback suppression.