features The science behind helicopter noise — and how the industry is working to reduce it The topic of noise is never far away for many helicopter operators. We look at where it comes from, why helicopter noise seems to generate a disproportionate level of complaint, and what can be done to help reduce it. By Ed Brotak | February 25, 2021 Estimated reading time 15 minutes, 44 seconds. For years, it’s been one of the most pressing issues in the helicopter industry. Operators field calls from residents complaining about it and must build flight paths in consideration of it, manufacturers are constantly looking at ways to reduce it, and it’s one of the key considerations for the emerging urban air mobility sector. “It” is, of course, noise.