That machine, the PC01, is about to get a lot quieter. Honda and Komatsu have announced that they're jointly developing an electric version, to be powered by Honda's swappable Mobile Power Pack batteries.
"In addition to significantly reducing noise and exhaust heat, electrification of the micro excavator will reduce its environmental impact by realizing 'zero exhaust gas emission,' which enables users to work comfortably in various indoor and outdoor work environments.
"Among various construction machines Komatsu offers, the PC01 is most likely to be used for various functions at worksites near people, trees, flowers and ornamental plants, including pipe-laying, landscaping and agricultural and livestock work. The two companies will strive to introduce the electrified Komatsu PC01 before the end of the current fiscal year, ending March 31, 2022."
I'm almost glad that they're probably not bringing it to the 'States…because then I'd have to look into leasing one.