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dBVision
dBVision: Track the noise with images!
Taking advantage of the unrivaled accuracy of Nearfield Acoustic Holography (NAH) for identifying noise weakness parts in your products.
This powerful software package is dedicated to acoustical imaging (pressure and intensity) based on the holography technique. dBVision enables to localize the sources with a spatial resolution that only holography can reach.
Sound intensity and partial power can be derived from the preliminary data analysis in order to establish a ranking of the noisy components, thus making dBVISION a powerful tool for the improvement of a large panel of products.
Needing the accuracy of acoustical holography for eradicating sound sources?
dBVISION provides you with the power of Nearfield Acoustical Holography (NAH) for:
- Best accuracy in noise Source localization
- Most operational process for capturing the real test situation (RELAX technology)
- Unique patented IPS technology for CABIN noise processing
- Source quantification through immediate radiated power evaluation (global & partial)
dBVision
Logiciel pour Holographie Acoustique
dBVision: Visualisez les sources de Bruit!
Tirez parti de la précision inégalée de l'holographie acoustique pour localiser et identifier les points de faiblesse de vos produits !
dBVISION intègre la technologie NAH (Nearfield Acoustical Holography ou Holographie de Champ Proche) et permet une localisation spatiale extrêmement précise des points de faiblesse acoustique.
Des fonctions de cartographies en intensité et la possibilité d'évaluer la puissance acoustique rayonnée, globale ou par sous-ensembles, complètent les capacités de dBVISION pour vous permettre l'amélioration continue de vos produits dans de nombreux domaines, du simple composant aux structures complexes telles qu'un habitacle de véhicule ou un transformateur électrique !
dBVISION vous offre la puissance de l'Holographie Acoustique en Champ Proche:
- Précision accrue pour la localisation des sources de bruit
- Prise en compte de la situation réelle de l'essai en mode opérationnel (technologie RELAX)
- Technologie IPS brevetée et unique particulièrement adaptée à la mesure dans les habitacles
- Quantification des sources grâce à l'évaluation immédiate de la puissance rayonnée (globale & partielle)
Key Features
A wide rangefitting general and specific customers requirements of solutions complying with dimension of the tested structure and application fields:
- dBVision (inside vehicle, cockpits)
- dBVision MARINE (signature of naval vessels and submarines)
- dBVision ENGINE (on running engine in test bench situations)
- dBVision COMPONENT (exterior measurement of test products and components)
With a combined approach (exterior/interior measurements), dBVision demonstrated the benefits of NAH and offers the most cost-effective solution recognized for industrial acoustical investigations pertaining to a wide range of structures and components, from design phase through tuning and modification stages of projects, up to final acoustic optimization.
Best system for diagnosis, comparison and optimization
- Accurate Source localization and quantification (ranking) on any tested equipment
- Parametric simulation of new potential solutions relying on source masking functions
- 2D/3D map visualization for an efficient dialog with design office and project management
- Perfect tool for benchmarking competing solutions and predicting acoustic final product score (synthesis)
Test productive and cost effective solution
- All operational situations met with a choice of compact user-friendly hand-held arrays
- Patented IPS coupled to remotely driven DAQ system reduces time & facility (wind tunnel operations, ...) costs
- Fully automated test procedures relying on robotized instrumentation for increasing added value time, dedicated to analyzing processed data and developing your most competitive solution
dBVision Technical Specifications
Software package
Data acquisition and database management
- Near-field pressure measurement, 3D visualization of measurement array locations
- Spectral analysis, holography mapping, noise source localization
- Visualization of pressure and intensity results (spectra, 2D colour maps),
- Global radiation power estimation
- Usual mathematical operators on NAH results (+,-,/, ...)
- Export to Matlab© (including time domain data)
- Batch functionality for data processing and reporting via automatic export to standard office tools
Software options
RANKING - Partial power computations and Source ranking according to selected zones (patch definition)
- TL: Transmission Loss computations possibly using selected zones definition (patch definition)
- FAR: Far-field predictions capabilities, radiations patterns (directivity, polar diagrams, ...) - standard or advanced modules
- EARPREDICT: CABIN Noise level predictions at arbitrary location inside an enclosure
- 3DV: 3D results display - enhanced interpretation capability
- MULTIPLAN: Multiple plan NAH measurement processing & related results display - includes 3DV option
- HOLOCYL: Cylindrical NAH measurements, processing & related results display - includes 3DV option
- RELAX: Automatic projection of measurement data onto regular grids from arbitrary antenna locations
Hardware components
- Acoustic arrays:
Standard 6, 10 and 12 channel arrays of microphones, IEPE* type 5cm spacing
Modular array of microphones, IEPE* type, 10 to 60 channel 2.5cm spacing
Any further array dimensions upon customer's request (esp. for Navy applications)
- Reference transducers (microphones, accelerometers, ...) used out of measurement plane
- dBVision patented Instrumentation Positioning System: Simple, non-contact geometry positioning device based on ultrasonic technology
- 2D, 3D and 5D robots for automated testing
Data acquisition
Full compatibility with stand-alone hardware: NetdB-DAQ platforms of 01dB, compact ORCHESTRA, PXI or VXI front-ends.
Product requirements:
- Recommended PC computer: Minimum configuration with Pentium IV (2.4 GHz) or Centrino (1.6 GHz) with 512MB RAM, 40GB HDD
- XVGA display
- OS Win 2000 SP4 or Win XP SP1.
* IEPE: Integrated PiezoElectric Electronic
For more information, please do not hesitate to contact us: nvh@01db-metravib.com
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Mesure des vibrations et des nuisances sonores
