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Velo is the Microflown software platform that combines the functionalities of nearly all Microflown systems into one integrated solution. Velo is fully configurable, therefore you can easily upgrade your Velo package with extra software applications or add-on modules.

The current version of the platform is Velo 4.B.15, contact us to receive the latest updates.


Flexibility to customize the working procedure at any stage of measurement: Record and define the project structure later or create a working tree to follow during a measurement campaign. A chart-based workflow offers intuitive guidance through your measurements. The possibility to create measurement templates speeds up the working procedure and furthermore, it is a robust platform to handle data for repeatable measurement campaigns.



Acoustic noise pollution can be reduced by absorbing sound energy. Absorbing material packages are used in many applications to attenuate sound. Knowing exactly the acoustic properties of your materials and the effectiveness of the applied material packages is a requirement to successfully reduce noise levels. The In-situ absorption setup is a solution to achieve just that.



The Scan & Paint 2D software offers a fast and easy solution for sound visualisation of stationary sound fields. The audio and video data is recorded and synchronised, the auto-tracking of the position of the probe allows extracting of very precise data from each frame of the video. After the scan is done you can quickly post-process the data using step by step tabs. High-resolution mappings of sound pressure, particle velocity, sound intensity can be displayed and analysed using the many tools available to quantify, compare and rank the main noise sources.



The baseline software can be expanded with the following additional software modules:

TPA Transfer Path Analysis

The combination of a direct near-field particle velocity measurement along with a transfer path measurement allows to calculate and visualise the sound pressure contribution to a certain listener point, thus providing a ranking of the noisiest areas of a cavity interior from the perspective of the listener.

A high velocity at the surface does not necessarily mean a high-pressure contribution to a certain position. In a complex environment such as a vehicle interior, the surface velocity can only give an indication about the source ranking of different areas. Traditionally transfer path analysis (TPA) offer a solution to rank sources but requires a multi-channel front end system with multiple sensors. An advanced version of the traditional Scan & Paint, called Scan & Paint TPA, is a solution for airborne TPA. This system introduces a fast method and requires a low number of channels. The Scan & Paint TPA not only maps the surfaces’ source strengths but transfer functions and phase references as well. This opens the option to preserve relative phase information between various measurement positions and their contributions to a defined location. All this with only 3 channels (two sensors solution) and an omnidirectional sound sources or orientation.

TL Transmission Loss

The Transmission loss is an additional software module, which will allow you to use the system for in-situ transmission loss measurements. This new module provides means to visualise the sound transmission loss in the form of an easy to interpret colour map.

The measurement procedure is as easy as the Scan & Paint system itself. All you need to do, in order to determine the sound transmission loss across a partition or structure, is to position a volume velocity source in the vicinity of the area you wish to measure. Drive the sound source with broadband noise, and carry out a scan with a Microflown PU probe over the target area. Two scans need to be carried out. One of the scans is done from the emitter side of the studied area and the second one is done on the receiver side. Both scans are processed exactly in the same way as any other Scan & Paint measurement would be. In the post-processing stage, the transmission loss module would merge the two scans, calculating the local sound transmission loss by taking the ratio between the spatially averaged sound pressure in the emitting side and the sound intensity in the receiving side. Finally, the image of the measured area is overlaid with the resulting sound transmission loss colour map


A unique tool for acoustic troubleshooting and sound source localisation, allowing you to visualise what you hear. It makes complex problems simple and easy to understand. Localise your sound sources and visualise the sound propagation in full 3D. Scan&Paint 3D offers you 3D sound vectors and colour maps displayed on a 3D model.



The Near Field Acoustic Camera allows localisation and real-time analysis of non-stationary noises such as squeaks, rattles and clicks. Unlike traditional techniques, the array of sensors does not only capture sound pressure, but the Near Field Acoustic Camera measures also directly the particle velocity. Hence, the Near Field Acoustic Camera yields an accurate particle velocity map in the full audible frequency range, while maintaining a dynamic range and an unmatched spatial resolution.



Acoustic Shape is the last addition to the Velo software platform, expanding the current array applications from 2D to 3D. Similar to Scan&Paint 3D, the key element of your measurement campaign is a 3D model. Multiple measurements can now be combined into one project by positioning and orientating the sensors around the 3D structure. Acoustic Shape can also be used to investigate non-stationary problems, enabling the localisation of transient noises or sound field changes over time by using an RPM signal to synchronise multiple captures. The software offers real-time process control and noise visualisation tools together with a broad range of analysis possibilities.



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