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  2. 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.

  3. The Hum - Wikipedia

    en.wikipedia.org/wiki/The_Hum

    A year later, multiple sources for the hum were identified in Darmstadt: two faulty air conditioner units, a faulty heat pump, and three structural noise protection measures on energy generation plants. [16] In 2022, hums were reported in St. Louis County, Missouri and surrounding areas. [17] In 2023, a hum was reported in Omagh in Northern ...

  4. Sound attenuator - Wikipedia

    en.wikipedia.org/wiki/Sound_attenuator

    A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

  5. Compressor - Wikipedia

    en.wikipedia.org/wiki/Compressor

    2 of these compressors can be mounted on the same shaft to increase capacity and reduce vibration and noise. [14] A design without a spring is known as a swing compressor. [15] In refrigeration and air conditioning, this type of compressor is also known as a rotary compressor, with rotary screw compressors being also known simply as screw ...

  6. Condition monitoring - Wikipedia

    en.wikipedia.org/wiki/Condition_monitoring

    Headphones allow humans to listen to ultrasound as well. A high pitched 'buzzing sound' in bearings indicates flaws in the contact surfaces, and when partial blockages occur in high pressure fluids the orifice will cause a large amount of ultrasonic noise. Ultrasound is used in the Shock Pulse Method [19] of condition monitoring.

  7. To play or not to play? That's the question the Chiefs face ...

    www.aol.com/sports/play-not-play-thats-chiefs...

    “You have to [try],” Mahomes said on Tuesday. “That’s the reason you play this game, to push to play. I’m not going to put our team in a bad position.

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