Rise in wind turbines and drones increases research in blade noise

With the increase in drones and wind farms around the world, aerodynamic noise from these sources has become a more and more prevalent issue. With regulations on these noises becoming stricter, the study on how much noise is made from these sources has become more important and monitored for the safety of biodiversity and the population around.

A study conducted in 2017 revealed an intriguing insight into human perception of noise, comparing the sounds of drones with those of vehicles. Surprisingly, even at equivalent volumes, the hum of drones proved significantly more bothersome to listeners. This finding underscores the significance of familiarity in shaping our tolerance towards environmental sounds. Similar principles apply to the hum of wind turbines, which, although moderate in volume, can trigger annoyance due to its distinct characteristics.

One of the key challenges lies in reducing aerodynamic noise generated by the rotating blades. Innovative solutions, such as serrated edges inspired by the wings of nocturnal birds, have shown promise in dampening turbulence and lowering noise levels by up to 3 decibels. These advancements not only enhance the acoustic environment but also optimize turbine performance, striking a delicate balance between efficiency and environmental impact.

In the realm of renewable energy, the significance of sound cannot be understated. As wind turbines continue to dot the landscape, innovations in noise reduction hold the key to fostering harmony between clean energy generation and community well-being. By harnessing the power of sound, we embark on a journey towards a greener, quieter future.

Borrum Energy Solutions recognizes our Anorra microgeneration wind turbines must make as little noise as possible as they are usually installed close to the point of consumption. Our studies have shown that when standing next to a 66ft Anorra Tower when wind speeds are around 5 meters per second, you will experience roughly 50 decibels of sound which is comparable to the noise of a conversation.