In stage performances, large-scale gatherings or TV shows, many users take the position of the wireless microphone is wrong, because of the mistakes in use, not only can a valuable microphone not play the superior characteristics of the original factory, but also buried the original Some sound quality, the result is worse than the sound effect of using a cheap microphone. Many audio controllers will only pick the sound quality of the microphone itself, thinking that as long as they have a valuable microphone or their own audition, they will get satisfactory sound, but they don’t know how to use the microphone correctly. Good sound quality.
1. Don't grab the mesh on the wireless microphone:
Many performers, using the palm of the hand to grasp the use of the microphone head, is the most bad posture that seriously damages the sound quality and directivity of the microphone. Using the microphone in such a posture, even if the most expensive microphone is selected, the original factory will have the absolute Good characteristics, thus losing the tone! The result of holding the net head with the palm is equal to the sound circuit around the sound chamber of the sound head or changing the resonant frequency of the air chamber, which will lead to serious deterioration of the front frequency response characteristics of the microphone and the separation of the directivity characteristics. And the resonance of a certain frequency is caused by the polyphonic effect of the palm to enhance the feedback sound. Although the wireless microphone is not entangled in the connection, it is convenient and safe to use, but the user often does not have to study the correct posture of the microphone and arbitrarily grasps the mesh head of the microphone. Such a use posture will certainly lose the original superior characteristics of the microphone. When a singer wants to use the microphone to reproduce the sound of the beautiful song, he must first learn the correct posture of the microphone. The posture of taking the microphone is very simple, just remember an important principle: no matter what you take, don't grab it on the mesh head of the microphone; the correct posture should be held on the tube of the microphone.
2, the use of two wireless microphones in one hand is the most serious wrong way:
It is often surprising to find that some politicians use two or even three wireless microphones in one hand. It is a very wrong way to use them. I don’t know if this is the user’s request or the sound engineering company’s creation. "If the former is instructed, it is understandable. If the latter's professionals make such an arrangement, they should whip three big boards!"
Because two different frequency transmitters are used close to each other, harmonic interference of internal distortion will occur. The closer or the higher the frequency, the more serious the interference. The system used in multiple channels will interfere with each other and receive. The problem of instability is more serious.
In addition to the problem of high-frequency harmonic interference, more than two wireless microphones together cause the audio phase and directivity interference of the microphone, which destroys the original normal sound quality of the microphone. When the audio phases of the microphones are the same, the outputs of the two microphones are added, causing the volume of the amplifier to increase and the feedback sound to be generated. Conversely, because the phases are opposite, the output of the microphone is subtracted, resulting in insufficient volume of the amplifier. The directivity of the microphone will also interfere with each other due to the proximity of the two microphones, which deteriorates the original excellent pointing characteristics. The degree of deterioration of these characteristics is proportional to the distance between the two microphones, so the user should avoid holding two hands in one hand. Or use more than two wireless microphones at the same time to avoid deterioration of volume, frequency response and directivity. Some people may think that if you take more than one, you can avoid using one. If one microphone fails, the other one can be used. In fact, to prevent the abnormality of the use of the wireless microphone, it is not solved by the method of "footboarding two boats". On the contrary, the use of this kind of error will bring more serious characteristic changes. It is recommended that Replace "use" instead of "simultaneous" to avoid the above missing. If you must use multiple microphones at the same time, you must pull at least 30 centimeters away from each other to reduce the change in microphone characteristics.
3, make good use of the distance between the wireless microphone and the mouth:
Use a directional wireless microphone to sing, pay attention to the microphone position, because the distance between the microphone and the mouth is very close, there will be a considerable change in sensitivity and sound quality, especially because the sensitivity of the microphone is inversely proportional to the square of the mouth distance, so the sound The performer with insufficient throat can not take the microphone too far from the mouth, and open the volume of the amplifier, which will easily lead to the feedback sound; the vocalist of the loud throat does not need to take the microphone too close to the mouth, which will easily lead to Produces the transition saturation distortion of the amplifier.
Furthermore, since the large-diameter directional microphone has a very obvious Proximity effect, when the microphone is close to the mouth, the bass will increase greatly as the distance is reduced. Therefore, if your voice is not enough, you can put the microphone. Close to the mouth, use the proximity effect to compensate your bass effect, make your voice thicker and more magnetic; on the contrary, if your voice is too low, you can keep the microphone away from the mouth to reduce the proximity effect of the microphone and lower the bass. The promotion will make your voice clearer and brighter.
The distance between the microphone and the mouth is also very important for the storm noise (PoppingNoise), especially for microphones with high sensitivity and strong bass response. The storm noise will be more serious. In order to reduce the lack of such noise, in addition to paying attention to adjusting the optimal distance used by the microphone, it is necessary to pay attention to the model with good characteristics of preventing storm noise when purchasing the microphone. The more advanced the microphone is to prevent the storm noise from being eliminated. Pay attention to it.
As mentioned above, the same characteristics of the microphone in different use postures will greatly affect the sound used, so the singer using the wireless microphone is not only a microphone with superior characteristics, the more important principle is to have a own A familiar microphone, constantly experience and practice the most correct posture, and know how to make good use of the distance between the microphone and the mouth, to adjust the volume and tone that best suits your throat, and to avoid the most troublesome storm noise. Show the best use of the microphone.
4. Avoid using the wireless microphone facing the speaker:
The wireless microphones used for general singing use the directional sound heads. Therefore, the microphones are used at the positions on both sides or behind the speakers, and the whistling sounds of the feedback are not generated. If you need to stand in front of the speaker, you must pay attention to the direction of the microphone and the speaker to be controlled at a certain angle, so as not to produce a feedback sound.
The position of the wireless microphone can be reduced by more than 90 degrees in the vertical or horizontal direction compared with the angle of the horn. The front of the microphone with the cardioid directionality and the horn of the horn remain 180 degrees or super-directional. The feedback sound between 120 and 140 degrees is the smallest. If you don't understand the directivity of your microphone and face it, you will easily get a loud response. Because the microphone and the speaker face each other is the most taboo angle, at any angle, any precious microphone will easily produce a screaming feedback.
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