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2. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   General 3.5 mm computer headsets come with two 3.5 mm connectors: one connecting to the microphone jack and one connecting to the headphone/speaker jack of the computer. 3.5 mm computer headsets connect to the computer via a sound card, which converts the digital signal of the computer to an analog signal for the headset. USB computer headsets ...

3. Microphone - Wikipedia

   en.wikipedia.org/wiki/Microphone

   Prior to the proliferation of MEMS microphones, nearly all cell-phone, computer, PDA and headset microphones were electret types. [citation needed] Unlike other capacitor microphones, they require no polarizing voltage, but often contain an integrated preamplifier that does require power.

4. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headsets provide the equivalent functionality of a telephone handset with hands-free operation. Among applications for headsets, besides telephone use, are aviation, theatre or television studio intercom systems, and console or PC gaming. Headsets are made with either a single-earpiece (mono) or a double-earpiece (mono to both ears or stereo).

5. Plantronics Gamecom - Wikipedia

   en.wikipedia.org/wiki/Plantronics_Gamecom

   Though Plantronics produced gaming headsets as far back as 1999, in 2004 the GameCom brand was created to encompass their gaming headset family. Since then, GameCom has released headsets compatible with both console and PC gaming platforms, hosted gaming tournaments, and sponsored professional gaming teams.

6. Microphone connector - Wikipedia

   en.wikipedia.org/wiki/Microphone_connector

   Two pins are used for the mono headphone signal and two pins for the unbalanced microphone signal. The 4-pin XLR connector is also commonly used on amateur radio microphones, but transferring unbalanced audio instead, and using the 4th pin (with the common ground) for a push-to-talk (PTT) circuit activated by a button on the microphone.

7. Plantronics - Wikipedia

   en.wikipedia.org/wiki/Plantronics

   Plantronics manufactured headsets for PC audio and online and console gaming via its GameCom and .Audio and RIG Gaming labels. Plantronics entered the multimedia headset market in 1999 with the release of the HS1 and the DSP-500 headsets, the latter featuring a built-in digital signal processing card.