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2. Intercom - Wikipedia

   en.wikipedia.org/wiki/Intercom

   Headset: Portable intercom connection from a belt pack to one or both ears via headphones with integrated microphone on a boom arm. Connects to a belt pack. Paging signal: An audible and/or visual alert at an intercom station, indicating that someone at another station wants to initiate a conversation. Power supply: Used to feed power to all ...

3. Interruptible foldback - Wikipedia

   en.wikipedia.org/wiki/Interruptible_foldback

   Interruptible foldback (IFB), also known as interrupted foldback, interruptible feedback, or interrupt for broadcast, is a monitoring and cueing system used in television, filmmaking, video production, and radio broadcast for one-way communication from the director or assistant director to on-air talent or a remote location.

4. Wireless intercom - Wikipedia

   en.wikipedia.org/wiki/Wireless_intercom

   Wireless intercom privacy can be provided if the audio stream is encrypted. Telex, HME, Altair and other intercom manufacturers offer encrypted wireless intercom for corporate, military and sports team customers desiring instant voice communications with privacy. [2] [3] The first use of encrypted wireless intercom in American football was in ...

5. Clear-Com - Wikipedia

   en.wikipedia.org/wiki/Clear-Com

   The company's FreeSpeak wireless intercom was nominated in 2020 for a TEC Award. [7] Clear-Com was purchased in 2010 by Southern California electronics manufacturer HME, known for supplying wireless headsets for drive-through fast-food restaurant operations. [8] Company headquarters were moved from Poway to Carlsbad, California, in 2018.

6. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   In the UK, use of wireless microphone systems requires a Wireless Telegraphy Act license, except for the license free bands of 173.8–175.0 MHz and 863–865 MHz. In 2013 the UK communications regulator, Ofcom, held an auction in which the UHF band from 790 MHz to 862 MHz was sold to be used for mobile broadband services. [23] [24] [25]

7. 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.