Possible Clues:

• Inert or passive, like some electricity
• It's still a southern attic
• Crakling or hissing noise caused by electrical interference
• Inactive or inert
• Stationary cats hold it back
• Winter buildup, at times
• Not moving or changing
• It's still a current nuisance, by the sound of it
• Back here one might find it in felines
• Still, the noise is a current one