How loud is a wind turbine at a house?

At a home 500–1,000 m away, typically 35–45 dB(A) arrives — comparable to a quiet living room or the hum of a refrigerator. At the source (nacelle), the sound power level is 104–109 dB(A), but it falls off sharply with distance.

A noise-reduced operating mode that runs the turbine more quietly at night (typically 3–6 dB less) by reducing rotor speed and pitch. It costs 1–4 % of annual yield.

Guide · Noise

How Loud Is a Wind Turbine?

In short: At the nacelle, a modern turbine produces 104–109 dB(A). But sound falls off sharply with distance — at a home 500–1,000 m away, only 35–45 dB(A) arrives. That is roughly comparable to a quiet living room or the hum of a refrigerator.

Sound levels compared

Sound	Level
Rustling leaves, soft whisper	20–30 dB(A)
Wind turbine at a house (500–1,000 m)	35–45 dB(A)
Quiet living room, refrigerator	40 dB(A)
Normal conversation	60 dB(A)
Main traffic road	70–80 dB(A)
Wind turbine directly at the nacelle	104–109 dB(A)

Why does the sound fall off so sharply?

Sound spreads spherically — the energy is distributed over an ever-larger area. With each doubling of distance, the level drops by about 6 dB. In addition, the ground, vegetation and air all attenuate it. The exact calculation is carried out according to DIN ISO 9613-2 in the acoustic emission prognosis (sound immission forecast).

What are the limit values?

The TA Lärm (Technical Instructions on Noise Abatement) sets the permissible levels at the house — at night (the critical case with wind):

Purely residential area: 35 dB(A)
General residential area: 40 dB(A)
Village/mixed-use area: 45 dB(A)

If a value is exceeded, the turbine runs in noise-reduced night mode.

Infrasound? The infrasound (< 20 Hz) generated by wind turbines lies far below the human perception threshold. Studies by the Umweltbundesamt (German Federal Environment Agency, 2020) found no health effects. The TA Lärm assesses the audible range.

Frequently asked questions

Can you hear a wind turbine at night?

With unfavourable wind and very quiet surroundings, a faint, steady swishing sound is possible. That is why night mode exists, pushing the levels below the guideline values.

Do modern turbines get louder because they are bigger?

Not necessarily. Larger turbines have higher hubs — the sound source is farther from the ground. Modern rotor blades are also aerodynamically quieter (serrated trailing edges). The sound power level is only moderately higher than for older turbines.

How is the noise assessed before construction?

Via the acoustic emission prognosis (sound immission forecast) in the BImSchG procedure (federal immission control permitting). A rough preliminary estimate is provided by our sound level calculator.

Wind turbine sound levels: 104-109 dB(A) at the nacelle, only 35-45 dB(A) at a house 500-1,000 m away. Sound decay minus 6 dB per doubling of distance. TA Laerm night values: purely residential area 35, general residential area 40, village/mixed-use area 45 dB(A). Night mode reduces 3-6 dB at 1-4 percent yield loss

Sound levels of a wind turbine – decay with distance, comparison and TA Lärm limit values