Mechanical / HVAC Hum Loop 1

A looping machine/mechanical hum from rubberduck's CC0 SFX pack, useful as an HVAC, plant-room or equipment ambience in building walkthroughs. Redistributed via the CC0-Public-Domain-Sounds repository. Software: Audio (ambient/walkthrough). Author: rubberduck. Licence: CC0-1.0. Source: https://opengameart.org/content/100-cc0-sfx-2