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Home / News > Does a directional microphone point at an actor and record a good voice?


Does a directional microphone point at an actor and record a good voice?

First of all, directionality refers to the range in which the microphone can record sound, not its usage.

The directionality is divided into omni-directional, 8-word-oriented and heart-shaped. To put it simply, omnidirectional is that the sound around the microphone is recorded in average, 8 words point to only the front and back of the sound is normal income, while the two sides are very weak, the heart-shaped point to only the front of an angle The voice is normally received, both sides and behind are faint; while the heart-shaped and distracted-pointing and super-cardioid-pointing, we usually refer to the gun-type strong pointing microphone refers to the super-cardioid-oriented. The difference between the three is the size of the angle that the microphone can normally receive in front of the microphone. In this way, it can be found that, in beats solo fact, one important role of directivity in simultaneous recording is to avoid noise. For the country it can greatly weaken the sound in the direction you do not need.

Of course, debilitating noise is not simply directed. Here is a very important concept in the recording, which is the signal-to-noise ratio. As the name implies, SNR is the ratio of effective signal to noise. So why do you need a signal-to-noise ratio? It's because in the post-production period, when you raise the volume, the beats by dre on sale beats by dre signal and the noise are raised together. When you lower the volume, the signal and the noise are also attenuated at the same time. If the signal-to-noise ratio is not good, then it may happen that you raise the volume of the dialogue cheap beats headphones to the right loudness but the noise becomes very obvious, or you reduce the noise to acceptable, but the dialogue is inaudible.

A directional microphone can point at an actor and record good sound. The directivity is only to attenuate noise, but we also need to increase the strength of the sound signal. How to increase signal strength? For sound, raising the signal is only related to one factor: distance. The attenuation of a country's sound is proportional to the square of the distance to the sound source. A friend who has shot with the camera's random wheat must have had such an experience. When you are within one meter from the person being photographed, the effect of his talking sound is still Satisfactory, but once he uses two meters long focal lengths, the voice becomes weaker, and if the distance is three meters away, it is almost impossible to hear the dialogue. So, no matter what microphone you use, you need to be close enough to the sound source, which is why when you shoot a movie, you need to put the microphone in front of the actor. It is not necessary to use the pick bar during the same period of recording, but to send the microphone to a good recording position when the person cannot approach. However, it is not that the microphone is closer to the performer. There is also a phenomenon of sound, called near-speaking effect. This means that if the microphone is too close to the sound source, the low frequency of the sound will be aggravated, making the dialogue muddy and affecting the clarity of the dialogue.