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Active noise canceling works reasonably well if focused to one area, like your ears in closed headphones (like my Sony WH-1000XM2) but is pretty useless in the open space of like a car interior. Especially with noise sources from all directions.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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