Wind turbines - sound and noise

Wind turbines create different types of sound through their construction and operation. Unlike many other sound sources, wind turbine noise has special characteristics that make it unique. It’s not just the volume of the sound that is relevant, but also its character and how it is experienced in different environments and situations.

When the wind turbine blades cut through the air, they create a characteristic swishing sound. This aerodynamic sound is rhythmic because it intensifies each time a blade passes the tower. Modern wind turbines also generate low-frequency sound and infrasound – sounds with such low frequencies that we cannot hear them but that can still affect the surroundings.

Sound propagation is affected by many factors. Wind strength and direction, temperature, humidity, and ground conditions all play a role in how the sound spreads and is experienced. Especially at night, when background noises are few, wind turbine sounds can become more prominent even at greater distances.

With technological development, wind turbines are becoming increasingly larger. The turbines being planned today can reach a total height of 250 meters to over 300 meters, which affects both sound generation and sound propagation. The longer rotor blades and higher placement mean that the turbines reach air layers with different wind conditions, creating new challenges for understanding sound impact.

This website provides an in-depth insight into the nature of wind turbine sound, how it arises, spreads, and affects both people and the environment. Here you’ll find information on everything from technical aspects to practical experiences of living near wind turbines.