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2. 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. [1]

3. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   Loudspeaker. The hole below the lowest woofer is a port for a bass reflex system. A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer [1] : 597 that converts an electrical audio signal into a corresponding sound. [2] A speaker system, also often simply referred to as a speaker or loudspeaker ...

4. Wireless intercom - Wikipedia

   en.wikipedia.org/wiki/Wireless_intercom

   A wireless intercom is a telecommunications device that enables voice communication without the need to run copper wires between intercom stations. A wired intercom system may incorporate wireless elements. There are many types of wireless intercom systems on the market. Most wireless intercom systems communicate by radio waves using one of the ...

5. Wireless - Wikipedia

   en.wikipedia.org/wiki/Wireless

   Wireless communication (or just wireless, when the context allows) is the transfer of information ( telecommunication) between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common wireless technologies use radio waves.

6. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft).

7. Speaker wire - Wikipedia

   en.wikipedia.org/wiki/Speaker_wire

   Speaker wire is a passive electrical component described by its electrical impedance, Z. The impedance can be broken up into three properties which determine its performance: the real part of the impedance, or the resistance, and the imaginary component of the impedance: capacitance or inductance. The ideal speaker wire has no resistance ...