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v. To hum at a certain frequency for a period of 0.3 seconds in order to test a sound sensitive electronic circuit.

May also include the infamous 'Helloooo~' to get a long sound wave to look at.

Often hilarious to watch.
My circuit got Neil Tested! He was saying 'Hellooo' for an entire minute before realizing the oscilloscope was disconnected! ROFL
by CJ @ College February 10, 2011