In addition to the wonderful sound and emotional part of the film and television works, it is also an indispensable part of the film and television works. How much do you know about the basic knowledge and skills of radio?

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The Achilles heel of amateurs: just have it (basically don't care much about the sound quality of the sound)

When filming, the most fearful thing is to encounter the kind of "there is a picture on the line" or "the sound is recorded to can" type of perfunctory words, other questions are basically a question. Although this does not seem to be a problem, there will be many loopholes in the editing process later, and the difference between professional and amateur can be clearly seen.

Common types of microphones

When we shoot a video, we compare the analysis of the commonly used types of microphone companies to carry out the general condenser microphone and dynamic microphone. Capacitive microphone sends sound to the internal diaphragm vibration, which causes the diaphragm to vibrate, resulting in a voltage change to generate a signal. It has a high sensitivity and is often used for high quality recordings, like guitar playing, complex ambient sounds and for use in the studio. Some condenser microphones require phantom energy to receive sound, and this method is a bit cumbersome to use. Another type of dynamic microphone is relatively cheaper than the next part because it contains coils and magnets, unlike condenser microphones, which are lighter and less sensitive to high frequencies, but it includes softer sound, suitable for recording vocals and live performances, etc. In indoor recording studios, some sound engineers will also use this type of microphone for sound effects. Our common microphone head pointing can be divided into super heart pointing microphone and heart pointing microphone.

Is it safer to have a low volume?

When the volume turns red, there will be distortion, just like a camera that overbursts and turns white during the shooting process and cannot be saved. So some of us just to be able to prevent the burst sound, simply adjust the volume of the microphone to the minimum, so that students no matter how loud China, will not reach a kind of warning zone range. Although safe, but may affect the sound quality, which is another point of knowledge we need to understand: the bottom noise.

What is the bottom noise? It is the background noise, a translation of the "background noise". Generally refers to the presence of signals unrelated to the generation, inspection, measurement or recording of all interference in the system. In addition, in industrial noise or environmental noise measurements, the concept of background noise is commonly used, referring to the surrounding environmental noise outside the measured noise source. For example, for noise measurements in the streets near a factory, if the measurement is to be traffic noise, the factory noise is the background noise. If the purpose of the measurement is to understand the situation of factory noise, the traffic noise becomes background noise. In the noise measurement process. Must pay attention to the degree of interference of background noise. So, if you naively think: when you record the volume a little lower, and then when you come back to pull it up, then you must be prepared to amplify the noise at the bottom.

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