Feedback happens when a microphone picks up sound from speakers and then pipes that same sound back through the speakers and picks it up again. The never-ending loop of ear-pain is frustrating to experience, but fairly easy to fix by adjusting the levels of the speakers and microphone. You can also employ noise cancellation so your computer will do the work of filtering out the feedback for you by applying software algorithms to remove unwanted sound from the audio system.
Right click on the speaker icon in the task tray on your computer and choose "Recording Devices." If you don't see the speaker icon you can press the Windows Key, type "Sound" and press choose "Sound" from the options.
Select the microphone on your computer on the Recording tab and click the "Properties" button.
Choose the "Listen" tab and remove the check in the box labeled "Listen to This Device."
Select the "Enhancements" tab and enable Acoustic Echo Cancellation from the list. Click "OK" to close the microphone properties window and click "OK" again to close the sound properties window.
You can also enable the Beam Forming enhancement for your microphone to have it focus on voice input and cancel other sounds.
Move your microphone and speakers so that they don't point at each other.
Turn down your speaker volume or use headphones when you are using your mic.
Turn off your mic when you aren't using it.
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