Feedback

Feedback is generated between a microphone and a loudspeaker when the same tone is caught in a loop an amplified again and again. This may happen when the volume of a certain sound is too loud; the audio system may be too loud or the source (the person talking) may be too far away from the microphone.


the avoid feedback poblems:
1) place microphone near the person, and physically as far from and behind the loudspeakers as possible.
2) Avoid placing microphones directly underneath ceiling mounted-speaker systems. Also, coach your presenters so that they cab avoid walkin underneath ceiling -mounted speakes
3)the presenter should stand at an appropriate distance from the microphoneor about 6 in. (15cm) away for a wires microphone. If the presenter is too far away, you may be empted to turn up the volume of the microphones output and that may cause feedback.
4) Beware of having too many open microphones at one time. Utilize the mute butons on a mixer to manage the microphones beter. You can also keep the gain (volume) lowered unused microphones.
5) Avoid placing too many microphone too close to each other.
6) Proper placement of a lavalier microphone on the presenter is critical to good microphone performance.


Feedback is best reduced through a combination of good loudspeaker placement and processing equipment. If the placement cannot be corrected, turn down the microphone or loudspeaker. Once the problem is corrected the result isnt instantaneous: it might take a second for the feedback o complete a cycle and die out.


Feedback also occurs uring audio and video conferencing. It manifests itself in the form of an echo or more feedback. The solution to this problem is often simple. Move the microphone away fom he loudspeaker or turn down the incoming or outgoing audi. There are many ways to resolve this problem, speak to a qualified professional.


best practices for controllong feedback include;
1) Keeping the microphone as close to the sound source as possible.
2) Keeping the loudspeakers in front of, and as far from the microphones as possible.
3) Selecting microphones with pickup patterns that complement the application.
4) Selecting loudspeakers with sound patterns that complement the application.


These practices will help increase your headroom - the maximum gain possible before feedback.That means how much power, which is translated to volume, can be achieved by the system before feedback occurs. Why does feedback occur with the power? Well, if you increase the volume too much, the sound waves from the loudspeaker have enough power toreach the microphone, causing the re-amplification of the same signal. If your loudspeakers output 70dB for a good listening level, abd feedback occurs in your