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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.
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]
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.
Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing. The mobile phone side of an HFP link is Audio Gateway or HFP Server. The automobile side of HFP link is Car Kit or HFP Client.
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.
Wireless communication between a smartphone and a smart lock for unlocking doors. 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".