Correct use and placement of wireless microphones

　　Ordinary conference venues, choose unidirectional cardioid or super-cardioid microphones, which should be placed around the sound source 20-30cm. If the distance is too close, it will produce a close-talking effect and cause too much low frequency of the sound, which will affect the speech. Clarity: If the distance is too far, the sound pressure of sound reinforcement is not enough. If you increase the preamplifier to increase the sound pressure of sound reinforcement, it will cause howling due to the acoustic response. Regarding the angle between the sound source and the microphone, the output effect of the microphone is the best when the sound source and the center axis of the microphone are at 0 degrees. In order to ensure a better sound effect of the pickup, the angle between the sound source and the central axis of the microphone should be kept within 30 degrees.

　　In high-quality sound reinforcement theaters or recording rooms, high-quality moving coil microphones can be selected, or condenser microphones with wide frequency response, smooth frequency response curve, and low distortion can be selected to achieve high-fidelity recording of the sound source Replay. For example, when picking up the sound of a large band, you can choose AB, MS, and XY planar microphones to pick up the sound. Place the microphone on the upper stage of the stage, 5-7m away from the band, with the microphone axis pointing towards the band.

　　Lavalier wireless microphones can be used when performing sketches in the theater, pole microphones can be used when playing cross talk; interface microphones in unidirectional microphones can be used when playing opera, placed on the left, center, and right of the stage Position, it can eliminate the reflection of the stage surface, and it can also effectively suppress the noise of the surrounding audience, without affecting the audience's field of vision.

　　For solo singers’ pickups, if it’s popular or folk songs, cardioid and super-cardioid handheld wireless microphones can be used. Within 1-250px away from the mouth, the emotional details in the singing can be picked up. In order to avoid the sound of teeth, it can be properly adjusted. Turn the wireless microphone to the side. In order to avoid the spout, if you encounter the initial "pb", the interval of the wireless microphone can be properly opened, and it can be placed 20-1000px away from the mouth.

　　When broadcasting all kinds of ball games in the stadium, the long gun in the single-point microphone is generally used. It has strong directivity and can pick up the sound at a distance. The angle of the single pickup range is small, and it needs to be used more on the scene in a ball game. Only microphones with different squares and different angles. Place it on the periphery of the playing field and point to the ball game field.

　　In some more important conference venues, unidirectional gooseneck microphones are generally used. Because of its super directivity, it can be placed 20-750px away from the mouth, and the angle between the mouth and the microphone axis does not exceed 30 degrees, which can increase the clarity of speech. Boundary microphones can also be used, and their pickup clarity is also very good, and it is not easy to see.

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