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  2. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

  3. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    The incandescent light bulb was for a long time the only light source used in automotive lighting. Incandescent bulbs are still commonly used in turn signals to stop hyper-flashing of the turn signal flashers. Many types of bulbs have been used. Standardized type numbers are used by manufacturers to identify bulbs with the same specifications.

  4. Centennial Light - Wikipedia

    en.wikipedia.org/wiki/Centennial_Light

    The Centennial Light is an incandescent light bulb, recognized as the oldest known continuously operating light bulb. It was first illuminated in 1901, and has only been turned off a few brief times since. It is located at 4550 East Avenue, Livermore, California, and is open to public viewing. [1] Due to its longevity, the bulb has been noted ...

  5. List of automotive light bulb types - Wikipedia

    en.wikipedia.org/wiki/List_of_automotive_light...

    UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.

  6. Active sound design - Wikipedia

    en.wikipedia.org/wiki/Active_sound_design

    Active noise cancelling (ANC) is a software process that uses existing in-vehicle infotainment hardware to eliminate undesirable noise within the interior of a vehicle. This elimination technique is known as harmonic order reduction, where unwanted audio signals are identified by sensors and filtered out of the overall interior vehicle sound.

  7. Vehicle horn - Wikipedia

    en.wikipedia.org/wiki/Vehicle_horn

    See media help. A vehicle horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The sound it makes usually resembles a “honk” (older vehicles) or a “beep” (modern vehicles). The driver uses the horn to warn people of danger. The horn is activated to warn others of the vehicle's presence ...

  8. How to Find Your Right Noise for the Best Sleep Ever - AOL

    www.aol.com/lifestyle/noise-best-sleep-ever...

    Most people think of white noise as a sort of consistent, fuzzy sound that, when utilized correctly, can drown out the sleep-destroying car alarm going off across the street or mute the yap-yap ...

  9. Daytime running lamp - Wikipedia

    en.wikipedia.org/wiki/Daytime_running_lamp

    LED DRLs on an Audi R8 LED DRLs on a BMW 6 Series Gran Coupe. A daytime running lamp (DRL, also daytime running light) is an automotive lighting and bicycle lighting device on the front of a road going motor vehicle or bicycle, [1] automatically switched on when the vehicle's handbrake has been pulled down, when the vehicle is in gear, or when the engine is started, [clarification needed ...