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  2. en.wikipedia.org

    en.wikipedia.org/wiki/sennheiser-headphones-discount

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  3. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/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. 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. It depends strongly on temperature as well as the medium through which a ...

  4. List of Bose headphones - Wikipedia

    en.wikipedia.org/wiki/List_of_Bose_headphones

    QuietComfort 20. The "QuietComfort 20" (QC20) and QC20i in-ear headphones were released in 2015 and are the company's first in-ear noise cancelling headphones. [19] It received a 2014 Red Dot Design Award. [20] Also, it received a CNET 's Editors' Choice Award of 4.5/5 points for its active noise-cancelling.

  5. Cyber Monday Tech Deals: 20 Major Discounts on TVs ... - AOL

    www.aol.com/cyber-monday-tech-deals-20-170000323...

    Black Friday has once again transitioned into Cyber Monday, so TVLine is rounding up the best Cyber Monday tech deals you’ll want to shop this holiday season. We’ve included a range of gadgets ...

  6. Xpect Discounts - Wikipedia

    en.wikipedia.org/wiki/Xpect_Discounts

    Xpect Discounts was a retail chain which started as a drug store then expanding into a full grocery store, consisting of seven stores in western Connecticut operating from the 1980s-2016. Xpect Discounts was operated by Clevelander Marc Glassman, who previously founded Marc's , which currently has nearly 60 stores in the Cleveland, Akron ...

  7. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Wireless headphones. Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open ...

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