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2. 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. [17] [18] [19] [20]

3. List of Bose portable audio products - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_portable...

   The portable audio products sold by Bose Corporation have been marketed as the SoundLink models. These wireless speaker systems are battery powered and play audio over a wireless connection from a separate source device (such as a computer or smartphone). Most models use Bluetooth to communicate with the source device.

4. Wireless speaker - Wikipedia

   en.wikipedia.org/wiki/Wireless_speaker

   Wireless speakers are loudspeakers that receive audio signals using radio frequency (RF) waves rather than over audio cables. The two most popular RF frequencies that support audio transmission to wireless loudspeakers include a variation of WiFi IEEE 802.11, while others depend on Bluetooth to transmit audio data to the receiving speaker.

5. List of Bose shelf stereos - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_shelf_stereos

   In 2018, Bose introduced its Home Speaker lineup of connected smart speakers, which integrate the same features of its SoundTouch Wi-Fi and Bluetooth enabled speakers for streaming music services, but also include Amazon Alexa and Google Assistant integration and integrated microphones. The cases on all Home Speaker models are made from ...

6. Electro-Voice - Wikipedia

   en.wikipedia.org/wiki/Electro-Voice

   Electro-Voice ( EV) is an American manufacturer of audio equipment, including microphones, amplifiers, and loudspeakers, focused on pro audio applications such as sound reinforcement and commercial and residential audiovisual installations. As a subdivision of Bosch Communications Systems Inc. since 2006, Electro-Voice markets products for use ...

7. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Protection of a "1-dimension zone" is easier and requires only one or two microphones and speakers to be effective. Several commercial applications have been successful: noise-cancelling headphones, active mufflers, anti-snoring devices, vocal or center channel extraction for karaoke machines, and the control of noise in air conditioning ducts ...