Audio feedback

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/audio-feedback

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the fundamental principle?Positive feedback loop where amplified output is fed back into the input
2. What is the historical naming?Also known as the Larsen effect, after discoverer Søren Absalon Larsen
3. Why does audio feedback make a loud squeal?It happens because the sound from the speaker goes back into the microphone, gets amplified again, and keeps getting louder.
4. How do engineers stop audio feedback?Engineers stop it by using microphones that listen only in one direction, adjusting the sound with equalizers, and using computers to cut out the loud parts.

Positive Feedback Loop: A system where the output signal is fed back to the input, amplifying itself.
Resonant Frequencies: Frequencies at which a system or object vibrates with maximum amplitude.
Cardioid Pickup Pattern: A microphone's directional sensitivity, shaped like a heart, rejecting sound from the rear.