That steady, almost hypnotic whine of an electric motor just sitting there doing nothing. It's the kind of sound you get from things like electric fans, air conditioning units, or small machinery that's powered up but not actually working hard.
That steady, almost hypnotic whine of an electric motor just sitting there doing nothing. It's the kind of sound you get from things like electric fans, air conditioning units, or small machinery that's powered up but not actually working hard.