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Ground-based acoustic imaging

Acoustic Inspection by Image

Locate a sound fault on the blade, rotor or nacelle, without stopping the wind farm.

Cornis ground-based acoustic imaging turns sound into a picture. A single acoustic antenna pinpoints where a sound emergence comes from on the machine, whether a blade, the rotor or the nacelle, and tells a defective part from a healthy one. It works while your turbines keep running. A blade-tip whistling is one example of the faults it reveals.

Request a demo → Product sheet (PDF)
Non-intrusive Blade, rotor & nacelle Onshore & offshore 100% Cornis technology
Flagship use case · No shutdown

Study one turbine while the others keep turning.

The standard method places a single microphone next to one machine, which means shutting down the whole wind farm to study one turbine at a time. Cornis works differently. A single acoustic antenna, made of many microphones, acts as a spatial filter and isolates one turbine among the others in operation. You keep producing while you diagnose.

  • Targeted diagnosis. Go straight to the machine with the sound emergence.

  • No full shutdown. The farm keeps producing while you inspect one turbine.

  • Fast response. Answer a complaint or a curtailment decision as soon as the measurement is done.

WITHOUT ACOUSTIC IMAGING
Whole farm stopped

You stop the whole farm to study one machine at a time.

WITH CORNIS
Turbine identified

One turbine diagnosed while the others keep producing.

Cornis ground-based acoustic imaging antenna on a tripod
One antenna, from the ground

A single portable antenna, set up in minutes.

No network of microphones to lay out across the site. One acoustic antenna, made of many microphones, recreates the full spatial array on its own. Set it on the ground, point it at the machine, and record while the turbine keeps running.

  • Autonomous and portable. Self-powered acquisition, ready in minutes.
  • Ground-based and non-intrusive. No close access, no climbing.
  • Onshore and offshore. Deploys across configurations.
Why choose acoustic inspection by image?

See the sound, exactly where it starts.

A cutting-edge Cornis solution to precisely detect, locate and diagnose acoustic faults on wind turbines. Designed to find a fault that is invisible to the eye and to drone inspection, answer noise complaints, guide curtailment and de-curtailment, and sharpen maintenance planning.

Precise fault localization

Visualize and pinpoint exactly where a sound emergence comes from, on a blade, the rotor or the nacelle, using advanced acoustic imaging.

Sees what the eye and drone miss

Reveal acoustic emergences that leave no visible trace, such as a whistling at the blade tip, and find the source others cannot see.

Non-intrusive and ground-based

A single antenna set on the ground, with no close access to the turbine. Ideal for difficult or hazardous environments, onshore and offshore.

Ideal for noise complaints

Detect and assess noise issues reported by nearby communities, and back your answer with documented, located evidence.

Guides curtailment and de-curtailment

Confirm which machine and which fault drive the noise, to curtail or release a turbine or the whole farm with confidence.

Enhanced predictive maintenance

Track acoustic trends over time to catch early warning signs, optimize schedules and extend turbine lifespan.

The blind spot

Some faults you can hear, but cannot see.

A sound emergence tells you something is wrong, but not where. It can come from a blade, the rotor or the nacelle, and it often leaves no visible trace for the eye or a drone. Acoustic imaging turns it into a picture and points to the exact source.

One antenna on the ground captures the machine's sound field and maps it onto the turbine, so the source is obvious at a glance. No climbing, no guesswork.

Field example · a blade-tip whistling

COMPLAINT
Residents report a tonal whistlingA recurring noise disturbing the neighbourhood.
SHUTDOWN
The turbine is stopped as a precautionLost production, and still no confirmed cause.
IMAGED
Source pinpointed at the blade tipLocated precisely with acoustic imaging.
DIAGNOSED
Root cause identifiedFixed-frequency self-noise at the blade tip. Targeted repair.
How it works

From complaint to pinpointed source.

A ground-based acoustic imaging campaign turns what you hear into what you can see and act on, while the turbine keeps running.

01

Ground setup

A single acoustic antenna is set up on the ground at the base of the turbine. No close or intrusive access is needed.

02

Acoustic capture

The machine's sound field is recorded in operation, capturing any emergence over full blade passages.

03

Imaging and overlay

Sound is reconstructed into an acoustic image and overlaid on the turbine to reveal the dominant source.

04

Diagnosed and reported

The source is located on the blade, rotor or nacelle and characterized. A clear basis for complaints, curtailment and repair.

Want the full detail of the offer?

Product sheet (PDF)
Cornis acoustic imaging overlay locating a whistling source at a wind turbine blade tip
From detection to diagnosis

Not just where it is noisy. Which part, and why.

The anomaly is mapped directly onto the turbine, turning a vague noise complaint into a precise, documented finding you can act on.

  • Exact source location. The emergence is pinned to the blade, rotor or nacelle.
  • Defective vs healthy, quantified. Over 40 dB difference at the source between a degraded and a healthy blade.
  • Root-cause insight. Characterize the fault, for example a fixed-frequency self-noise at the blade tip.
  • Rotating source handled. The source is tracked as the blade turns, through the Doppler shift.
  • Ready to act. Documentation to answer complaints, decide curtailment and target the repair.
Under the hood

The technology behind the image.

A ground-based acoustic imaging chain engineered by Cornis to isolate a single source, precisely, from a compact footprint.

A single antenna, many microphones

One acoustic antenna acts as a spatial filter and localizes the source on the machine, even among turbines in operation. No ground network to deploy.

Frequency-domain beamforming

A pseudo-time formulation suited to slow-rotating blades, delivering real-time maps filtered within the frequency band of interest.

GPS and inertial orientation

GPS distance to the tower and an inertial unit record the array's attitude (yaw, pitch, roll) to keep the geometry accurate.

Deconvolution to a single source

Advanced processing narrows the display dynamic range to isolate one dominant source, sharply refining localization.

Full-span viewpoint

Measured from the base and in front of the turbine, at distances up to 100 m, for the best view over the whole blade span.

Onshore and offshore

Autonomous, self-powered acquisition designed to deploy across configurations, with or without blade serrations.

Noise and maintenance, handled together

Optimize your noise management with acoustic imaging.

Precise, non-intrusive inspection for better turbine health and reduced environmental impact.

Answer complaints with proof

Turn a subjective noise report into a documented, located finding you can share with communities and authorities.

Curtail or release with confidence

Know which machine and which fault to act on, to curtail or release a turbine or the whole farm on solid evidence.

Reduce environmental impact

A cleaner acoustic footprint for your wind farm, with maintenance targeted only where it is needed.

Contact us for a demo

Ready to see where the sound comes from?

Talk to the Cornis team about acoustic inspection by image for your wind farm.

Request a demo → Product sheet (PDF)

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