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2. Speed of sound - Wikipedia

   en.wikipedia.org/wiki/Speed_of_sound

   Speed of sound. The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn ), or 1 km in 2.91 s or one mile in 4.69 s.

3. AirPods - Wikipedia

   en.wikipedia.org/wiki/AirPods

   Website. apple .com /airpods. AirPods are wireless Bluetooth earbuds designed by Apple. They were first announced on September 7, 2016, alongside the iPhone 7. Within two years, they became Apple's most popular accessory. [ 4][ 5] AirPods are Apple's entry-level wireless headphones, sold alongside the AirPods Pro and AirPods Max .

4. The 7 Best Wireless Surround Sound Systems for an ... - AOL

   www.aol.com/lifestyle/best-wireless-surround...

   Best Wireless Surround Sound Systems. Best for Audio Fanatics: Nakamichi Shockwafe Elite. Best Theater Sound: Sony HT-A7000. Best Value: VIZIO M-Series 5.1. Best Upgrade For A Wired System ...

5. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [ 1] It uses five full bandwidth channels and one low-frequency effects channel (the "point one"). [ 2]

6. FYI, AirPods are the same price they were on Prime Day - AOL

   www.aol.com/lifestyle/fyi-airpods-are-the-same...

   Apple AirPods (2nd Generation) $80 $129 Save $49. This is an outrageous price for AirPods! In fact, it's a record-low price, so if you've been toying with a pair or need to replace your current ...

7. The 5 best workout earbuds - AOL

   www.aol.com/news/5-best-workout-earbuds...

   Apple AirPods Pro (2nd gen) $ at Amazon. Apple AirPods Pro (2nd gen) $ at Best Buy. Apple AirPods Pro (2nd gen) $ at Apple. Most secure fit: JBL Endurance Peak 3 Pros: Ear hook design, waterproof ...