How does a wireless microphone work

How does a wireless microphone work
How does a wireless microphone work

Recently, our team was constantly working on live audio concerts that required a wireless microphone and receiver.

Wireless microphone receiver and transmitter systems are easy to set up and get right, but I think we will do a little research on how a wireless microphone works in detail.

How does a wireless microphone work? Wireless microphone receiver and transmitter transmit their wireless connectivity between transmission devices.

The wireless mic and receiver send the signal from the phone microphone to the signal cable and sends it wirelessly to the receiver. The wireless mic and receiver then determine the key microphone signal for the microphone connection.

How does a wireless microphone work
How does a wireless microphone work
How does a wireless microphone work

How does a wireless microphone work

Wireless mic transmitters are used in the same way as wired microphones. There is only one difference between the two: the standard “wired” microphone has an XLR external communication interface and a connector and relies on a wire that transmits the signal to use the microphone. In contrast, a radio microphone relies on a radio transmitter to transmit its functions to the receiver before being transmitted to the microphone.

Microphones work with electronic and wireless microphones. The microphone consists of 3 parts:

Wireless System Piece 1: The Microphone

The microphone component of the software is the same as any other standard microphone. Wireless mic transmitter come with a range of transducer/capsule principles (power moving coil, capacitor, and even power tape).

Like any microphone, wireless microphone receiver fm mic act as transducers that convert energy from acoustic/wave devices (sound) to electrical energy (sound):

  • The waves vibrate the sound of the speakers.
  • The vibrations of the diaphragm are converted into a signal voltage using an electric current (energy) or by changing the capacitance (capacitor) of the capsule.
  • This signal may be amplified to the microphone before output.

The Microphone Body

Bluetooth microphone transmitter are generally hand-held, prettier, or headphone-like (it doesn’t make a lot of sense for a stationary studio microphone to be wireless, but you never know what you might need in a given situation).

Typically, the microphone organization of an fm wireless microphone system is larger than a “wired” handheld mic. This is due to handheld cordless microphones have built-in receivers and these transmitters need batteries to work wirelessly.

The wireless lavalier and headphone microphones aren’t wireless. The small mesh microphone attached to clothing near an artist’s mouth is too small for an electrical transmitter attached to it. Headphones can also be too heavy or bulky if the transmitter is integrated.

Wireless lava microphones have a thin wire that leads to a transmitter. External transmitters are usually supplied in the form of small belt pouches. Battery Lava is not wireless. However, the transmitter on the belt does not allow the microphone to be physically connected to the corresponding microphone input on an audio console.

Wireless System Parts 2 And 3: The Transmitter And Reciever

When talking about wireless microphone transmitter and receiver system, it is best to think of the transmitter and receiver as a unit (although they are separate).

The transmitter emits an audio signal generated by a wireless mic set up on a specific radiofrequency. The receiver receives this particular radio frequency, and therefore the audio signal.

The wireless microphone transmitter and receiver system can operate wirelessly. The wireless mic setup is usually located near the audio console. The output of the tube is usually connected to the microphone input of the audio console using a KSLR cable.

The Transmitter

Transmitters work by conveying an audio signal from a microphone through radio waves. The transmitter picks up the audio output from the microphone, converts it into a radio indication, and transmits it through the antenna.

The government adjusts the power of the radio signal from the wireless mic transmitter and receiver to avoid unnecessary interference beyond the practical distance of the wireless microphone transmitter receiver system. The effective distance of the transmitter is usually 100 to 1000 feet, depending on the conditions.

Wireless microphone system transmitters originate in 3 different types:

  1. Handheld
  2. Plug-in
  3. Belt pack

The hand transmitter is similar to the “normal” microphone handles and is usually attached to special microphone capsules. In some cases, we can combine handheld transmitters and microphone capsules.

The plug-in transmitter is a separate transmission box in which we place normal microphones. These transmitters transform our normal microphones into wireless microphones. Some plug-in transmitters even offer phantom power and are compatible with active microphones.

Belt transmitters are small and easy to hide in clothing, making them a great product for movies and TVs. Typically, at least a couple of wires (small cords) are needed to connect the microphone transmitter (usually a lavalier or headphones).

All cordless microphone systems use FM and require 200 kHz bandwidth (internal modification). To produce this band, the radio cables used to transmit the cordless mike signals are as follows:

  • VHF (maximum) = 30-300MHz
  • UHF (high voltage) = 300MHz – 3GHz

The microphone receiver power supply used by the VHF is usually set to the signal frequency. This can be easily compared to their lamps but makes them inconvenient to use if there is interference from RF near the set frequency.

The new cordless mike normally works in UHF. However, these frequencies are also set in their range, and therefore 300 MHz – 3 GHz is not available at all. This group is known as the “TV Band”.

The microphone receiver that works on these televisions often can change its frequency. This makes it easy to avoid RF interference and use multiple wireless micro-devices simultaneously.

The transmitter and receiver must be connected to the same radio signal to transmit the wireless mic setup correctly. The transmitter can be considered as a small radio station that transmits sound through the microphone. The receiver must be configured to receive radio waves to “hear” the microphone.

The Transmitter

The wireless mic setup receivers use the radio via the microphone transmitter and transform it back to an audio signal. The receiver can determine the required audio signal and must be connected to the microphone level to understand the audio recording.

Again, for an fm wireless microphone system to work properly, the receiver must be configured to receive the same radio signal that the device transmits. In VHF systems, this value is always set so that the transmitter works with its overload meter. In UHF systems, these frequencies change frequently and it is up to us to ensure that the transmission is based on the transmitted frequency.

The fm wireless microphone system can be divided into 3 main types and affects how the receiver receives the radio transmitter. The:

  1. Non-diversity
  2. Diversity
  3. Accurate diversity

The Non-diversity system receiver has a single antenna to accept the indication from the transmitter.

The diversity systems have two short antennas. Both are connected to the same transmitter. The wireless connection takes place only between the transmitter antenna (on the microphone side) and the receiving antenna (on the receiving side).

An accurate diversity system uses two antennas, each connected to a different receiver. The receiver reads two antennas and selects the two better. At least one antenna must receive a clean signal, which must provide a clean signal with a minimum of interference.

Advantages and Disadvantages of Wireless Microphones


  • It permits complete liberty of movement.
  • They have a fresh, artistically pleasing presence.
  • They remove cluttered-looking cables.


  • They have a little variety of about 300 feet.
  • They’re vulnerable to intervention from other cordless devices.


The microphone is great for performers and those looking for the freedom to move around without the awesome USB cable. You can choose PDA, headphones, or lavalier, depending on the purpose and appearance you want. In addition, they are very efficient, requiring only a transmitter and a receiver to operate.

Of course, there are unique features for each component that need to be customized and integrated for the whole system to work properly. The result is a unique, unparalleled sound. If this is what you are looking for, then we hope the above information makes any confusion clear. It can also ask you to use it professionally and answer the question “How does a microphone work?”

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