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2. Public address system - Wikipedia

   en.wikipedia.org/wiki/Public_address_system

   A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

3. Golden-i - Wikipedia

   en.wikipedia.org/wiki/Golden-i

   Golden-i headsets feature a 15-inch virtual laptop-size qHD microdisplay manufactured by Kopin Corporation [5] which can be adjusted to be used below the left or right eye, [6] 9-axis head-tracking technology with a digital compass and GPS, [7] speech recognition software with two noise-cancelling microphones [8] (supporting 38 languages), [9] Bluetooth, [1] Wi-Fi and USB connectivity, [4] 3D ...

4. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Most 2.4 GHz Wireless Headsets come in two units, a wireless headset and a wireless base-station, which connects to your original telephone unit via the handset jack. The wireless headset communicates with the base-station via 2.4 GHz RF, and the voice signals are sent or received via the base unit to the telephone unit.

5. JBL - Wikipedia

   en.wikipedia.org/wiki/JBL

   JBL currently serves the home and professional audio markets. Their professional products include live PA systems, studio monitors, and loudspeakers for cinema. Their home products include home audio speakers, waterproof Bluetooth speakers, and high-end car audio. JBL is owned by Harman International, a subsidiary of Samsung Electronics.

6. In a time before PA systems, rodeos used a guy with a loud ...

   www.aol.com/time-pa-systems-rodeos-used...

   The loudspeaker system was invented. That meant that producers didn’t have to pay for the rare person with both announcing skills and a loud voice. Now all they needed was a person who could ...

7. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   Wireless control of and communication with iOS and Android device phones, tablets and portable wireless speakers. [41] Wireless Bluetooth headset and intercom. Idiomatically, a headset is sometimes called "a Bluetooth". Wireless streaming of audio to headphones with or without communication capabilities.