It's funny how a device such as a leaf-blower is deemed time-saving. I imagine it's noisy, because an effective silencer would add weight? Since selling the hobby farm and living in town; I prefer to use mostly hand tools. Including a push-mower that is more than effective over a powered machine. My one indulgence, is a battery driven string trimmer. Despite my neighbour's huge maple tree, i find clean-up with a rake, to be, not a problem. As well as effective.
Overall, the amount of noise in society since the 1960's is alarming! It comes from a myriad of sources and few people seemed concerned about the pollution. Living in a mountainous part of Canada, a person has to climb over the surrounding hills to escape it. Only to hear the thwack, thwack sound of a helicopter coming in to land.