Hum of the Hollow Baseboard

I followed a low, continuous rumble vibrating through the floorboards into the shadowed hollow behind the tall shelf. A cool current brushed past, carrying the tiny hum of electricity from a thick wall cable. I pressed the flat side of my forearm firmly against the wooden skirting board. The entire wall murmured back in a long, steady chord. I tilted my head, letting the vibrations pulse straight through my frame, completely still as the room settled around me.