- As a person speaks, vibrations from the voice cause a thin membrane in a wireless headset microphone to vibrate. Electronic circuitry inside the headset converts those vibrations to radio waves, according to the National Radio Astronomy Observatory, and an antenna transmits the radio waves at a designated frequency. Other wireless headsets tuned to the same frequency pick up the radio waves, convert them into electrical impulses then feed them to a speaker for conversion into audible sound.
- Though wireless communication dates back to Italian inventor Guglielmo Marconi's 1895 use of radio transmission, a history of radio headsets posted by retailer Headset Plus notes that Nathaniel Baldwin developed the first radio headset in 1910. The U.S. Navy bought 100 headsets from Baldwin just before World War I.
- Wireless headset communications are useful in a number of applications. Professional race car drivers use wireless headsets to free their hands while driving, and some motorcycle riders use the devices to communicate with other bikers. Wireless headsets also appear in aviation, sports and a variety of other venues.
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