Our solutions

We develop and deploy smart sound and vibration monitoring solutions, tailored to your specific needs. Below are some of the applications that we provide:

  • Advanced sound metrics

    Smart Sound MonitoringNext to the 1/3-octave band spectrum with a temporal resolution of 1/8s, our sensing solutions provide all common noise metrics (LAeq, Lden, percentile levels etc.) on-the-fly at custom time intervals, and allow to assess a wide range of advanced sound indicators, including psychoacoustical indicators (loudness, sharpness, roughness, tonality) or state-of-the-art sound metrics such as the Common Noise Index, with an arbitrary temporal resolution. We can even add your own designed indicator!

  • Soundscape analysis

    source_recognitionOur sensor nodes analyze sound in a way that is highly similar to how humans listen to sound. Through the use of artificial neural networks and state-of-the-art machine learning methods, they can detect and classify sounds according to their source, and in this way provide an idea of how the acoustic environment would be perceived. This can be used to evaluate existing soundscapes, but our algorithms can also be applied to simulated or auralized environments, such that soundscape design measures can be evaluated.

  • Detection of sound events

    Our technology allows to detect, record, classify and signalize events occurring near the sensor nodes, such as gun shots, explosions or other impulsive events, as well as car/fire alarms, accidents, aggression or panic situations, through a continuous and in-depth spectro-temporal analysis of sound and/or vibration. This makes our smart sound monitoring technology well suited for security applications.

  • Localization of sound sources

    Our sensor nodes can act cooperatively, creating multi-device arrays. Through a combination of multi-sensor time/direction-of-arrival and cross-correlation analyses, the location of sound sources (impulsive, intermittent or stationary) can be estimated. We have a particular experience with the localization of low-frequency sound sources, for which typically large arrays are needed.

  • Fixed and mobile noise mapping

    Paris mapOur mobile sensor nodes are equiped with GPS and allow to map the soundscape of extensive areas with great spatial detail, an application that is particularly suited for urban areas, squares and parks. In combination with fixed sensor nodes, they can also be used to refine dynamic noise maps, through a model-based spatio-temporal interpolation technique developed at Ghent University.

  • Sound as a proxy

    Sound contains a wealth of information. We provide solutions to derive information on the local state of the environment on the basis of the analysis of sound. Examples are road traffic counts, the average speed of road traffic, or even the local instantaneous emission of traffic-related air pollutants such as black carbon (BC) or ultra-fine particles (UFP), through fusion of sensor node data with meteorological and background concentration data.