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  2. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    A noise-cancellation speaker emits a sound wave with the same amplitude but with an inverted phase (also known as antiphase) relative to the original sound. The waves combine to form a new wave, in a process called interference , and effectively cancel each other out – an effect which is called destructive interference .

  3. List of Sony products - Wikipedia

    en.wikipedia.org/wiki/List_of_Sony_products

    Sony Olympus Medical Solutions Inc. was founded on April 16, 2013, as a cooperation between Sony (owns 51%) and Olympus (owns 49%) with a goal to develop, design and sell surgical endoscopes with 4K+ resolution and 3D technologies. [1]

  4. 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 ...

  5. Sony Dynamic Digital Sound - Wikipedia

    en.wikipedia.org/wiki/Sony_Dynamic_Digital_Sound

    Sony Dynamic Digital Sound (Japanese: ソニー・ダイナミック・デジタル・サウンド, Hepburn: Sonī Dainamikku Dejitaru Saundo, SDDS) is a cinema sound system developed by Sony, in which compressed digital sound information is recorded on both outer edges of the 35mm film release print. The system supports up to eight independent ...

  6. 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 ...

  7. Passive radiator (speaker) - Wikipedia

    en.wikipedia.org/wiki/Passive_radiator_(speaker)

    The middle speaker is a real loudspeaker. The top and bottom cones are passive radiators. In the same way as a ported loudspeaker, a passive radiator system uses the sound pressure otherwise trapped in the enclosure to excite a resonance that makes it easier for the speaker system to create the deepest pitches (e.g., basslines). The passive ...