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HOW TO CONTROL FEEDBACK A performer's number one enemy in using a microphone is "feedback." This is a harsh hum, howl or squeal which occurs when the microphone picks up sound from the loudspeakers, re-amplifies and rebroadcasts it over and over again. The key factor in the prevention of feedback is the position of the loudspeakers in relation to the microphone. Feedback occurs if the microphone picks up sound coming from the loudspeakers. Keep the loudspeakers as far to the sides as possible-so they do not point toward the microphone. Always keep the microphone pointed toward the performer and away from the loudspeakers. When stage monitor loudspeakers are used, make sure they are positioned in front of the performers and face the rear of the microphone. If you are in a room with hard walls, floor, and ceiling, the sound from the loudspeakers may bounce back into the microphone and create feedback. Solve this problem by turning down the amplifier volume control and working closer to the microphone. (Important Note: If you cannot solve the feedback problem with your UNIDYNE@ microphone, a Shure Feed111 back Controller is suggested.) BASIC POINTS FOR PROFESSIONAL MICROPHONE TECHNIQUE Proper microphone technique will add to the overall effectiveness with which you project yourself to your audience. Keep the following points in mind when using the microphone: 1. Maintain the proper distance from the microphone. When you wish to achieve an intimate tonal quality, get closer to the microphone and lower your voice. For wide-open "driving" effects, raise your voice and back away from the microphone so that you do not overdrive your amplifier to distortion. 2. Don't change your distance from the microphone needlessly, as this will affect the level of sound coming from the loudspeakers. 3. Consider the microphone as an instrument and practice your technique to enhance your performance.
