TOA Canada - Secure Wireless Communication: Infrared Wireless Microphone Systems
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Secure Wireless Communication: Infrared Wireless Microphone Systems

Infrared microphones are widely used as a convenient wireless communication tool, because of their security features against eavesdropping and radio interference. They are a very secure and confidential way to conduct important meetings and conferences. Infrared Wireless Microphones are also ideal for classroom environments. They do not rely on wireless frequencies, and can be used in every room of your facility without interference.

What is infrared?

The light spectrum is made up of visible and invisible light. The visible light spectrum includes violet, indigo, blue, green, yellow, orange and red. Infrared light is invisible to the eye and harmless to the body. It has light waves with wavelengths(*1) that are longer than that of visible red light rays, and therefore called "infra-red" rays. Ultraviolet light is on the other end of the light spectrum, and has a shorter wavelength than that of visible violet light rays. While ultraviolet light has ill effects on the human body, (e.g. sunburn), infrared light does not.

Spectrum of Light

What are the advantages of infrared wireless microphones?

Light does not penetrate walls(*2), therefore the infrared microphone has three key features:

  1. Privacy function against eavesdropping. Unlike radio waves, infrared rays do not penetrate walls. Information transmitted through infrared rays will be highly protected and secure against third party listening outside of the room with the infrared system.
  2.  No interference among adjoining rooms operating on the same channel. Even if the same communication channel is used in adjoining rooms, no interference occurs. Channel change is not required.
  3.  Stable communication. Secure communication is assured in urban areas without being disturbed by jamming of radio wave communication.

(*2) Penetrates the transparent walls, such as glass walls and windows.

What are suitable locations for infrared wireless microphone systems?

Highly recommended for conference, board rooms, and classrooms, located close to each other.
Cautions : Possible unsuitable locations for use

  • Outdoor, due to the sun-light interference.
  • Directly in front of plasma displays, due to the leakage of infrared noise.

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Infrared Wireless Microphone Systems