How Wireless Microphones Work – Part 2

The three major components for a wireless microphone system are the actual microphone, a transmitter to send the radio signals, and a receiver to convert these signals into sounds. In the past one of the biggest problems with this technology was interference of the signal between the transmitter and the receiver. This often occurred on stage when multiple systems were being used at the same time. The frequency of the individual systems often clashed as they were very close, which caused microphones to malfunction and be unreliable.

Why Use a Wireless System?

Taking the above into consideration, why do people use wireless microphones? The purpose behind the wireless system is to eliminate the cable which connects the microphone to the sound system. This reduces the chances of cables being pulled from sockets at either end when performers move about the stage.

Technology has advanced in leaps and bounds from the first wireless systems, and now rarely are there any problems in frequency transmission which means the sound is crystal clear and uninterrupted. Each performer or instrument is broadcasted at a different frequency, and it is important frequencies are not shared as they would interfere with one another. If this is all done correctly, then the wireless microphone system will be faultless.


A transmitter is used to send an audio signal to be converted into an actual sound. When using a hand-held microphone, a separate transmitter is not needed as it is built into the actual unit. But for smaller wireless microphones such as a lapel unit, then a separate transmitter has to be also worn which is normally clipped onto a belt or something similar.


A key component to the whole wireless microphone system is the receiver, as it is this unit that has to convert radio signals into actual sound that replicates the voice. These receivers come in different varieties and can be single or multi-channeled that can handle multiples of microphones at the same time.

The Benefits of Wireless Technology

There are many productions now that have been enhanced by wireless technology. In past days, theater performances were amplified using microphones at the front of the stage, but this technology had many flaws. And the biggest was that performers at the rear of the stage could not really be heard, and every voice was at a different volume.

Being able to carry a wireless microphone on the body changed everything, now an audience could hear each individual voice the same volume wherever the performer happened to be on the stage. The technology also offered freedom of movement, which meant that virtually any type of production could be staged on any type of stage.

There is no doubt that a simple thing like taking the cables away from microphones and instruments has transformed live performances of any type. It is hard to imagine productions on the grand scale of today actually taking place using the old technology.

How could a production of Walt Disney’s Frozen on Ice possibly be undertaken without wireless technology?

Wireless microphones have revolutionized the way live performances can be seen by audiences and have increased all our viewing pleasure.