We have previously noted that people often view new technology with skepticism, and even trepidation bordering on fear. That perception changes as both costs decrease (resulting in more people using and adapting to the new technology) and the recognition of the tangible benefits produced by the new technology. In the early 20th Century, both automobiles and planes were new technology, and were initially met with resistance and skepticism.
A recent NASA study analyzed human reaction to audio recordings of noise created by automobiles, drones, as well as computer generated sounds (auralizations). In short, the study found that the human subjects rated noise created by drones as significantly more annoying than traffic noise.
It is important to note (and the study itself notes) that this is a single study and it “was not conceived to be a comprehensive examination of noise from either sUAS or road vehicles. Rather, it was meant, primarily, to demonstrate the extensibility of tools and facilities that NASA already possesses to the realm of sUAS noise. Therefore, it is unwise to attempt to generalize the results of this study beyond those stated in the discussion, and beyond the limited set of vehicles and conditions tested.”
The study also notes that the sound made by a drone does not qualitatively resemble the sound made by manned aircraft. As noted in the study: “This difference in sound quality introduces an unknown factor into the prediction of the resultant annoyance.”
Although this is a single study and is limited in scope, the initial analysis of the results of the study suggests that at least for the near future, the noise created by drones is another hurdle to overcome in accomplishing widespread public acceptance of having drones operating in near proximity to humans.
Another takeaway from the study is that human reaction to the noise from drones may compel some local governments to enact regulations governing where drones can operate due to the fact that people appear to find drone noise more objectionable than other routine background noise. Such would be unfortunate, assuming that the drone noise in question is no louder than other background noise.