Another way dishwashers are made quieter is by cycling the water in between the middle / upper spray arm and the middle / lower spray arms. Cycling the water between the upper and lower zones allows the machine to run a little quieter. Most dishwasher decibel ratings are around 56 decibels. Itâs tough to imagine what that sounds like if youâve never known what to listen for. There are many different comparisons- imagine something like a gentle breeze through tall trees. My parents have a 56 decibel rated Bosch.
Mirages occur when there is a rapid shift in air density in the atmosphere -- when the air at one level is a lot hotter than the air at an adjoining level (check out this page to find out why hot air is less dense than cold air).
When the light appears for a third time, Deena suggests that it may be moving. The video then concludes with the sky going dark and the phenomenon disappearing for good. It is not yet known what caused the flashes of light but it has been suggested that they were the result of a power line going down in the area.