We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Causes Amplifier Feedback?

By Brooke Edwards
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Few things are more disruptive to a soothing song or spirited speech than the painful shriek of feedback. Amplifier feedback occurs when the microphone picks up its own sound projected from the speaker and loops that sound back into the system, amplifying it again and again. This cycle happens so fast, with sounds looping back and forth at an estimated 1,000 times per second, that what comes out is feedback. Depending on the frequency that’s looping, the amplifier feedback can be a high-pitched screech or a deep, booming roar.

When amplifier feedback begins, the audience flinches and typically looks to the back of the room, hoping the person in the sound booth can help. The sound engineer can adjust volumes and frequencies, and should have taken key steps ahead of time to prevent feedback. However the person holding the microphone may also play a role in causing amplifier feedback.

If the person holding the microphone steps in front of the speakers, the loop is almost certain to begin. This is why amplifier feedback is even more likely with wireless microphones, which tend to be omnidirectional and allow the performer to walk in front of the speakers. The closer the microphone gets to the speaker, the louder the feedback is likely to be. Also, if the speaker or singer holds the microphone far from their mouth, the sound engineer has to turn up the volume to accommodate, increasing the likelihood of feedback occurring.

While it's impossible to completely safeguard against amplifier feedback, there are many things that can be done to prevent it or stop it once it’s occurring. Tips include:

  • Turn the volume down. This is the most immediate fix if feedback is taking place. The volume should be kept only as loud as it needs to be for the audience to hear.
  • Keep the microphone behind the speakers, so that it cannot pick up its own sound. Point the speakers away from the person speaking or singing.
  • If working with an equalizer, lower the frequency where the sound is feeding back.
  • Turn off any microphones not in use.
  • Encourage the person on the microphone to hold it close to their mouth.
  • Use unidirectional microphones, which only pick sound up from a limited direction, typically within about 60 degrees. Omnimicrophones pick up sounds from all directions.
  • If possible, soundproof the room by laying down carpeting and other materials that will deaden the sound bouncing back to the microphone.
  • Purchase and install a feedback controller. These electronic processors monitor the sound and automatically reduce the levels if a feedback frequency is reached.
EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By Markerrag — On May 12, 2014

Feedback might not be desired for speeches, but guitarists love it. Well, some do at any rate. Throwing some controlled feedback in a song can work wonders.

Here's some trivia. What was the first time feedback was intentionally used in a song? 1964 when the Beatles opened "I Feel Fine" with Paul McCartney's bass feedback. The Beatles claimed at the time that it was an accident, but it was done on purpose and may have actually launched a revolution. Feedback wasn't desirable until the Beatles used it and showed how effective it could be.

By Logicfest — On May 11, 2014

Believe it or not, some ear-piercing feedback can come in handy from time to time. Picture this. You've got a crowded hall full of people who are visiting. They are there to hear a featured speaker share some wisdom. The featured speaker goes up to the podium, tries to get the crowd's attention and is not successful. Initiating some feedback can grab their attention in a hurry and provide just the interruption needed to get a noisy crowd to pay attention.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.