3D beamforming allows to map acoustic measuring data from the Acoustic Camera on 3D models and therefore literally adds another dimension to sound source localization. In postprocessing or while measuring the 3D model and the three-dimensional acoustic picture from the Acoustic Camera are matched using the intuitive and fast workflow of our own software NoiseImage. Any 3D model can be added to the measurement data in NoiseImage, regardless if it was created using CAD software or scanned with a laser scanner. When using gfai tech’s patented 3D acoustic imaging solution Dynabeam the 3D model and the acoustic picture are created in the same workflow eliminating the need to acquire the 3D model separately.


Our patented solution generates a 3D model while measuring the acoustic emissions at the same time. Different array positions are considered to virtually increase the channel count, reduce artefacts and raise the dynamic. Measurement positions and distances are automatically extracted from the derived scan trajectory, allowing an instant combination without any additional tracking devices or fitting requirements.

The full NoiseImage post processing functionality is directly employable allowing you to focus on your acoustic analysis. The result shows a highly dynamic acoustic image mapped on a detailed 3D model. Considering different scan directions, the main emission directivity is optionally visualized via arrows.

  • Combined 3D measurement of geometry and acoustic emissions
  • Quick setup, mobile measurement and analysis
  • Precise results in 3D with enhanced acoustic dynamic and reduced artefacts
  • Microphone array positions automatically extracted from scan trajectory - no additional setup or tracking devices are necessary
  • Virtual increase of channel count
  • True to scale 3D model export to common file formats
  • Quick interpretation of complex sound emission directivity patterns
  • Upgradeable from any gfai tech Acoustic Camera

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DynaBeam - 3D Scanning and Sound Localization

Acoustic Photo 3D

The NoiseImage software module Acoustic Photo 3D allows you to add another dimension to your analysis. Mapping your data in on any 3D model, either for interior measurements of all kinds or for analysing complex structures from the outside. The patented algorithm for fitting measurement object and array delivers quick and precise results. All the well-known and proved features of NoiseImage can be used with the 3D option and you can optimize your beamforming results like you are used to. One key advantage of 3D beamforming is that the acoustic images are calculated based on the distances between microphone array and meshes / points hence the calculation takes several focus layers into account. That way beamforming in 360° around the array is possible. Furthermore single or multi array measurements of any object from the outside mapped on a 3D model will be more precise.

  • Acoustic mapping on 3D models (triangle meshes and point clouds)
  • All time and frequency domain beamforming options
  • Show Lp and Lw values on tooltip
  • Load 3D models (*.3ds *.asc *.cnk *.fls *.igs *.obj *.ply *.stl *.wrl)
  • 3D export
  • Mesh resampling
  • Freely adaptable 3D acoustic resolution
  • Photo exports (e.g. *.jpg, *.png, …)
  • Additional features:
    • Load IGES 3D models
    • Triangulate point clouds
    • Basic editing functionalities (mark & invert, cut triangle meshes or point clouds)
    • Manual acoustic resolution

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Acoustic Camera: 3D Sound Source Localization Inside a Car

Advanced Algorithms

The NoiseImage module Advanced Algorithms holds all its features ready for the 3D analysis and allows you to optimize your results. Due to the several focus layers which are taken into account you can expect better results for scenarios with sound sources in different distances.

  • Acoustic Eraser: Enables eliminating or isolating sound sources
  • High Dynamic Range (HDR): Deconvolution in the time domain. For better contrast/source resolution through sidelobe suppression
  • CleanSC: Deconvolution and massive increase of dynamic in frequency domain beamforming
  • Correlation Analysis: Correlation filter and correlation function to correlate your acoustic imaging analysis with additional sensors, user-defined sources or files
  • Delete autocorrelation: Eliminates the inherent noise of the microphones, increases dynamic range
  • Difference Spectra: presents the spectra of two recordings combined in a new window and subtracts the corresponding Spectral Acoustic Photos, thus serving as a tool to display even the smallest changes to the measurement object
  • MUSIC Algorithm: for better localization of tonal sound sources and in the low frequency range
  • Orthogonal Beamforming: Method for sound source analysis and ranking
  • Power Beamforming: A gfai tech unique feature to decrease the complexity in post processing. Power Beamforming works with an easy to use slider to choose the strength of the additionally applied algorithms and it contains a number of beamforming algorithms: Functional beamforming, asymptotic beamforming, inverse functional beamforming and adaptive beamforming for dampening the sidelobes and sharpening the main lobes
  • Rotational Beamforming: For analyzing rotating objects, like fans or rotors and to clearly identify the position of the sound sources on the fast moving objects
  • RMS & Max peak: RMS (effective value) is the common method to integrate an interval over a chosen time and create the image. The Max peak method allows to see the maximum values in the acoustic map whenever they have occurred during the calculation interval
  • Zero Padding: A method to clearly identify the location of highly transient noises or data with a high amount of low frequency content. Zero Padding virtually increases the integration time without adding content

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Acoustic Camera: Beamforming Result of the Sound of a Gearbox