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Wireless microphones are convenient, but will you use them?

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Time of issue:2022-01-14
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(Summary description)Early mics were connected by cables and had no problem using karaoke in a recording studio or small space. Singing a song quietly on stage might be fine, but doing some dancing is tough. Therefore, when performing on stage, people tend to use wireless microphones.

Wireless microphones are convenient, but will you use them?

Categories:News
Author:
Origin:
Time of issue:2022-01-14
Views:0

Information

Early mics were connected by cables and had no problem using karaoke in a recording studio or small space. Singing a song quietly on stage might be fine, but doing some dancing is tough. Therefore, when performing on stage, people tend to use wireless microphones.

The convenience of wireless microphones is obvious to all. In addition to stage performances, it is also widely used in KTV, conference rooms and other occasions. When using a wireless microphone, most users assume that they can talk as long as they are connected to a device. In fact, there are many tricks and considerations for using wireless microphones. You can't use a wireless microphone without understanding how it works and its features.

wireless microphone

How do wireless microphones work?

A wireless microphone, also called a wireless microphone, consists of two parts: transmitter and receiver. Among them, the transmitting part is powered by a battery, and the microphone converts the sound into an audio signal. After processing by the internal circuit, the radio wave of the audio information can be transmitted to the surrounding space.

The receiving part is usually powered by a power supply. First, the radio waves emitted by the transmitting part are received by the receiving antenna, and then the audio signal is extracted through the internal circuit processing, and then transmitted to the public broadcasting system through the output signal line, thereby completing the wireless transmission of the audio signal.

After understanding the working principle of wireless microphones, let's talk about the problems that should be paid attention to when using wireless microphones.

First, pay attention to impedance matching

The output impedance of the wireless microphone is the same as the input impedance of the amplifier, which is a good match. If the mismatch ratio exceeds 3:1, it will affect the audio transmission effect. Although it can also be used, there will be a significant loss of high and low frequency sounds.

2. Pay attention to the effect of working distance and talking at close range

When holding a wireless microphone to speak or sing, the working distance between the microphone and the mouth is generally 750px-1000px. If the distance is too long, the reverberation will increase; if the distance is too close, the signal will distort the audio, affecting clarity. This is the "near language effect". When broadcasting at close range, low frequency sound will be significantly improved.

Of course, the effect of talking about the sound is not completely undesirable. Seasoned and skilled professional singers sometimes use this effect to alter the sound.

Third, pay attention to the angle of the sound source and the wheat

Wireless microphones have a certain effective angle. Generally, the sound source should be aimed at the center line of the microphone as much as possible, because the greater the deviation angle, the greater the loss of effect.

Fourth, pay attention to the placement and height of the wireless microphone

Sometimes when we turned on the mic, we heard a screeching sound, which was caused by the mic being too close to the speaker. If we take it a long way, we'll be fine.

When using a microphone stand, the height of the wireless microphone should be consistent with the height of the performer's mouth, so as not to affect the sound reception effect if it is too high or too low.

5. Pay attention to take out the battery in time

Wireless microphones usually require batteries. If the battery voltage drops, the sensitivity of the microphone will decrease and the distortion will increase. Therefore, remember to remove the battery in time when not in use for a long time. After the battery has been used for a period of time, even if the power is not completely exhausted, the battery should be replaced in time.

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