Our good old bosch dishwasher is doing its magic. This is a more rhythmic loop. You can hear a glass or bowl squeaking/ringing in the water jet inside the device. Recorded x/y stereo with two audio technica at4041 mics into a marantz pmd 661 recorder. Normalized plus some eqing using fabfilter pro-q3.
This is the refrigerator at min min’s house. It has a slight tingling sound in there, i've noticed. Recorded with zoom h5 recorder (xyh-5)october 22, 2018.