Acoustic Holography - STSF
Nearfield acoustic holography (NAH) is a method of mapping noise sources based on a complete sampling of the sound field. The method is very accurate and allows any property of the sound field like sound pressure, sound intensity or particle velocity to be calculated in any plan parallel to the measurement plane. The method has excellent resolution and maintains it's source separation capabilities even at low frequencies.
The unique Brüel & Kjær second generation SONAH algorithm not only pushes the low frequency limit of classical NAH by a factor of five but also supports the use of irregular array geometries allowing the same array to be used by both STSF and Beamforming. The combination of these two methods provide optimal resolution in the full audible frequency range.
PULSE STSF software is centered around an easy-to-understand tree structure where all measurements and calculations are represented. From there, drag-and-drop functionality allows you to plot results in both 2 and 3D. In addition, results can be superimposed on an image of the measured object.
Uses
- Noise-source location
- Mapping of noise from small and medium size objects such as engines, vehicle components, appliances, power tools etc.
- Sub-source sound power contribution analysis
- Fully automated measurement process
Features
- Mapping of sound pressure, sound intensity and particle velocity
- Intuitive documentation including animations using source image overlay
- Low to medium frequencies (100 Hz - 5kHz)
- Non-stationary option: Averaging in Time, RPM, Angle domains and listening to source points
- Expandable with Beamforming and Conformal Mapping
Screen Shots:
Products
