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  2. 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 ...

  3. 6 things you should do to make sure your air conditioner is ...

    www.aol.com/news/6-things-sure-air-conditioner...

    The thermostat on the unit can sense any heat emitting from those objects and can cause the air conditioner to work overtime, according to the U.S. Department of Energy. Setting the fan speed on ...

  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. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    A unit ventilator is a fan coil unit that is used mainly in classrooms, hotels, apartments and condominium applications. A unit ventilator can be a wall mounted or ceiling hung cabinet, and is designed to use a fan to blow outside air across a coil, thus conditioning and ventilating the space which it is serving.

  6. How to lower your air conditioning bill

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    GE Window Air Conditioner Unit $164.00 at Amazon. GE Window Air Conditioner Unit $139.99 at Best Buy. GE Window Air Conditioner Unit $159.00 at Home Depot. Insignia 300 Sq. Ft. Portable Air ...

  7. Background noise - Wikipedia

    en.wikipedia.org/wiki/Background_noise

    Background noise is an important concept in setting noise levels. Background noises include environmental noises such as water waves , traffic noise , alarms , extraneous speech , bioacoustic noise from animals, and electrical noise from devices such as refrigerators , air conditioning , power supplies , and motors .

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