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  2. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    A 2007 study found passenger compartment sound levels could exceed 90dB(A). [18] Research has shown that sirens mounted behind the engine grille or under the wheel arches produces less unwanted noise inside the passenger cabin and to the side and rear of the vehicle while maintaining noise levels to give adequate warnings. [19]

  3. Electric vehicle warning sounds - Wikipedia

    en.wikipedia.org/.../Electric_vehicle_warning_sounds

    The 2011 Nissan Leaf was the first electric car equipped with Nissan's Vehicle Sound for Pedestrians called 'Canto'.. Electric vehicle warning sounds are sounds designed to alert pedestrians to the presence of electric drive vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs) travelling at low speeds.

  4. Electromagnetically induced acoustic noise - Wikipedia

    en.wikipedia.org/wiki/Electromagnetically...

    The torsional deflection of a simple cylinder cannot radiate efficiently acoustic noise, but with particular boundary conditions the stator can radiate acoustic noise under torque ripple excitation. [8] Structure-borne noise can also be generated by torque ripple when rotor shaft line vibrations propagate to the frame [9] and shaft line.

  5. Car alarm - Wikipedia

    en.wikipedia.org/wiki/Car_alarm

    Motion sensors monitoring the vehicle's interior are installed in some higher end models. The simplest aftermarket alarms are one-piece units with a siren and control module. The most common type of sensor is a shock sensor and two wires (12-volt constant power and ground) which are connected to the car's battery.

  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. [3]

  7. The truth behind that constant ringing in your ears and what ...

    www.aol.com/lifestyle/2015-12-03-the-truth...

    That ringing or buzzing in your ears at any given time is a symptom commonly known as tinnitus. According to the National Institutes of Health , "1 out of 10 US adults has experienced tinnitus in ...

  8. Kristin Cavallari Caught Intruder Crawling on Her Floor While ...

    www.aol.com/kristin-cavallari-caught-intruder...

    Noting, “My kids still do not know [this] to this day,” Cavallari — who shares sons Camden, 12, and Jaxon, 10, and daughter Saylor, 9, with ex Jay Cutler — added that the event took place ...

  9. NYT ‘Connections’ Hints and Answers Today, Thursday, December 12

    www.aol.com/nyt-connections-hints-answers-today...

    1. All of these words sound like a specific letter in the alphabet. 2. These items are known for their notched edges. 3. Expressions that show mild frustration. 4. Features of a flowing body of water.

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