But I'm psychometrically pickin' up other vaguely infrastructural / transit-zone vibes here too: elevator shafts, server-farm heat-sinks; late-nite Metro / Tube tunnel maintenance; the small-hours sound of petrochemical plants, electrical sub-service stations, container-ports. After-hours systems resetting themselves, ticking over. Things that are either not going anywhere or are in no hurry to get there.
Post-Ballardian abstraction. Reductive / misheard maint.noises.