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How do I fix my feedback problem?

Feedback: Fact and Fiction One of the most commonly asked questions in professional audio is “What microphone can I use that doesn’t cause feedback?” The answer to the question is, of course, that no such mi...


Theater Audio: The Science Behind the Illusion

Theater Sound: The Science Behind the Illusion Have you ever noticed how great Broadway shows sound? Does the rock band in "Rent" get your blood pumping? Do the lyrics to "Memories" get you choked up every...


Basics of Equalization and Feedback

Basics of Equalization and Feedback Equalization: Selectively boosting or cutting bands of frequencies to improve the performance of a sound reinforcement system. What equalization can do when used properly: Notic...


Microphone for a podium with no feedback, please

Feedback: Fact and Fiction One of the most commonly asked questions in professional audio is “What microphone can I use that doesn’t cause feedback?” The answer to the question is, of course, that no such mi...


Which microphone has less feedback?

It is impossible to say that the SM58 or Beta 58A is better or worse at feedback rejection. The amount of rejection that each has is completely dependent on the physical relationship of the microphone versus the loudspeakers. ...


Omni or Unidirectional??

The omni will provide a more consistent and nautural sound with less clothing noise. Why should I use an omnidirectional microphone? Directional Mic compared to an Omnidirectional Mic The omnidirectional microphone wi...


Are automatic microphone mixers necessary with multiple microphones?

Yes. An automatic mixer will reduce amplification of background noise, increase gain before feedback, and reduce comb filtering. - more information -


How does the DFR differentiate between feedback and music?

If feedback is being used in a "musical manner", like a rock quitarist, the DFR cannot tell the difference. It will attack the feedback. Or a note held on a pipe organ might also be "pure" enough to fool the D...


Controlling Feedback

Feedback is a complicated process. Entire books have been written on the subject and the mathematical formulas that model feedback are quite involved. Below is a summary of the issue. The root causes of feedback are irregula...


Potential Acoustic Gain Calculator, Definition, and Articles

The PAG (Potential Acoustic Gain) calculation provides an estimate of how much louder a sound source (talker, singer, musical instrument) will be heard when the PA system is active. The PAG estimate is for the location of the o...


Can in the ear monitors feedback?

While not impossible, it is extremely unlikely that a feedback loop would occur between a microphone and an in the ear monitor. We have never heard of it occurring. But, if feedback occurs between the microphone and the fron...


Principles of Sound System Design

Designing and installing a sound system requires a great deal of knowledge, experience, and skill. It appears that the system was not designed properly for the needs of the church. Unfortunately, the problems are serious and the...


Dynamic and Condenser feedback differences

There are no differences in the feedback characteristics of dynamic vs condenser. More information: Feedback: Fact and Fiction - How do I fix my feedback problem? Microphone Techniques for Music - Sound Reinforceme...


Feedback with Shure SM58

Yes, the placement is a very important factor. Move the amplifier further away from the microphone and point the amplifier away from the microphone. Feedback: Fact and Fiction.


Shotgun Microphone for a PA System?

A shotgun will not work. In your situation, a mic that is within 12" or less of the talker is required. The reason is physics - the Potential Acoustic Gain equation. A wireless mic is a great solution. Or a mic on a sta...


55SH II feedback issues

The rear rejection of the 55SH does not have as much rear rejection as most other microphones. The rear rejection of the 55SH is about 10-15 dB at most frequencies. In comparison, the SM57 and SM58 have a rear rejection of about ...


Does parametric equalizer eliminate feedback?

When equalizing a system for feedback control, the object is to remove any peaks that are introduced from sound system components, room modes, etc. By using equalization, the gain of the system can usually be increased 3-6 dB. An...


Monitor Loudspeakers for Church Choir

Good idea: Use of a monitor loudspeaker so the choir can hear the pastor, the soloist, or the band. Bad idea: Use of a monitor loudspeaker so the choir can hear themselves sing even louder. By definition, a choir i...


Beta 53 and feedback

The Beta 53 is an omnidirectional microphone. We are not surprised that you are encountering feedback problems. The Beta 53 is designed for speech applications and live sound where loudspeakers are NOT close to the stage, like in...


Solution for too many open mics

Use a voice activated mixer like the Shure SCM810 or SCM820. To calculate the increase in gain if the unused mics are off, use this formula: 10*log(number of open mics). Here is an example for 6 open mics: The log of ...


Gain before feedback with multiple microphones

Yes. Every time the number of open microphones doubles, the amount of gain available before the sound system will feedback decreases by 3 dB.   Gain Changes Based on Mic Placement and Number of Open Mics


Banner material to reduce feedback

First, search our Knowledge Base for the word "Feedback" by clicking on the following: Feedback Search. This will bring up many bulletins on this subject. These bulletins have multiple suggestions on controlling feedbac...


Collection of Feedback Troubleshooting Hints and Links

When will feedback occur? A very simple answer. Controlling Feedback Basics of Equalization and Feedback How do I fix my feedback problem? Microphone for a podium with no feedback, please Does parametric ...


Sound reinforcement for a church choir

In short, you have hit a brick wall and the wall is made of the laws of physics. Distant miking of a choir using two or three mics is not possible in a loud "rock and roll" church environment like yours. To underst...


Feedback Reduction

Consider using the Shure DFR22 Also, the use of in-ear monitors can help control feedback. More Information: Feedback - Fack and Fiction. Understanding Sound System Design and Feedback Using Math


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