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2. Dwayne 'The Rock' Johnson unveils new wireless Project Rock ...

   www.aol.com/entertainment/dwayne-rock-johnson...

   Work out like The Rock! Dwayne Johnson unveiled the latest product from his Project Rock collection for Under Armour: the Project Rock True Wireless In-Ear Headphones, made in partnership with JBL ...

3. List of Billboard Mainstream Rock number-one songs of the ...

   en.wikipedia.org/wiki/List_of_Billboard...

   Mainstream Rock number-one songs of the 2020s. The Billboard Mainstream Rock chart is compiled from the number of airplay songs received from active rock and heritage rock radio stations in the United States. [ 1] Below are the songs that have reached number one on the chart during the 2020s, listed in chronological order.

4. Through-the-earth mine communications - Wikipedia

   en.wikipedia.org/wiki/Through-the-earth_mine...

   Through-the-Earth (TTE) signalling is a type of radio signalling used in mines and caves that uses low-frequency waves to penetrate dirt and rock, which are opaque to higher-frequency conventional radio signals. In mining, these lower-frequency signals can be relayed underground through various antennas, repeater or mesh configurations, but ...

5. Electrostatic loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Electrostatic_loudspeaker

   Electrostatic loudspeaker. Schematic showing an electrostatic speaker's construction and its connections. The thickness of the diaphragm and grids has been exaggerated for the purpose of illustration. An electrostatic loudspeaker (ESL) is a loudspeaker design in which sound is generated by the force exerted on a membrane suspended in an ...

6. Embedded with built-in speakers, these futuristic Bose ... - AOL

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7. Category:Wireless speakers - Wikipedia

   en.wikipedia.org/wiki/Category:Wireless_speakers

   Wireless speakers. A wireless speaker is a loudspeaker that receives audio through radio frequency waves rather than through audio cables. The two most popular and widely used are variations of IEEE 802.11 or Bluetooth.