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  2. List of Sony products - Wikipedia

    en.wikipedia.org/wiki/List_of_Sony_products

    Today's division Sony Semiconductor Solutions Group was founded in 2015 and focuses on manufacturing image sensors, [3] microdisplays, [4] LSI, [5] laser diodes. [ 6 ] [ 7 ] [ 8 ] Image sensors

  3. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Active noise-cancelling headphones use a microphone, amplifier, and speaker to pick up, amplify, and play ambient noise in phase-reversed form; this to some extent cancels out unwanted noise from the environment without affecting the desired sound source, which is not picked up and reversed by the microphone. They require a power source ...

  4. List of Sony Walkman products - Wikipedia

    en.wikipedia.org/wiki/List_of_Sony_Walkman_products

    The Sony Walkman X series was a touchscreen audio and video player that was on the market from 2009 to 2010, designed to compete against the iPod Touch. [65] It has a 3-inch (76 mm) OLED touch screen, internet access through Wi-Fi and digital noise-cancelling as well as applications for Slacker and YouTube. It was available in 16 GB and 32 GB ...

  5. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    Walmart security watches shoppers enter on Black Friday This "code" is one of many innocuous sounding secret codes that stores use to alert employees to problems without distracting you from shopping.

  6. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    This is because an engine's cyclic nature makes analysis and noise cancellation easier to apply. Modern mobile phones use a multi-microphone design to cancel out ambient noise from the speech signal. Sound is captured from the microphone(s) furthest from the mouth (the noise signal(s)) and from the one closest to the mouth (the desired signal).

  7. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Fogel is considered to be the inventor of active noise cancellation, and he designed one of the first noise-cancelling headphones systems. Later on, Willard Meeker designed an active noise control model that was applied to circumaural earmuffs for advanced hearing protection. Noise-cancelling aviation headsets are now commonly available. [5] [6]