Headset

The headset or ear slider is a combined electronic device between the headphones and the microphone. This tool is commonly used for listening to voice and simultaneously talking to communication devices or computers, for example for VoIP. Headset technology has penetrated into the world of communication, especially mobile phone technology.
Ways of working
The workings of a headset is to use an electric frequency that is converted into a hertz sound wave that our ears can hear.
History
The headset was first invented in 1910 by Nathaniel Baldwin, a Stanford University student. But this discovery is not immediately a public concern, because like the inventors of that era, Baldwin was not interested in producing his inventions in bulk.
Headset Development

In World War I, the American navy learned of Baldwin's discovery and produced 100 headsets for war. Since then the public began to realize with this technology, even in 1961 headset used in the cockpit of aircraft. The pilots love it because the headset is lightweight and comfortable to wear. The headset was first used for telephone in 1970. In early 2000, along with the development of mobile phones, Bluetooth-based wireless type headset became popular