Technische Universitat Graz

Technische Universitat Graz and Forschungsholding Tu Graz Gmbh

Marián Képesi

Gernot Kubin

Michael Stark

Michael Wohlmayr

A sensor system is located in an environment composed of a first medium, where waves propagate with a first phase velocity, the sensor system including at least one main enclosure and a sensor array with at least two sensors, said sensor array being arranged inside the main enclosure, wherein the space inside the main enclosure between the sensor array and the inner surface of the main enclosure is filled with a second medium, in which waves propagate with a second phase velocity, the second phase velocity being different from the first velocity.

Housing for microphone arrays and multi-sensor devices for their size optimization

The invention relates to a method for localizing and tracking acoustic sources () in a multi-source environment, comprising the steps of recording audio-signals () of at least one acoustic source () with at least two recording means (), creating a two- or multi-channel recording signal, partitioning said recording signal into frames of predefined length (N), calculating for each frame a cross-correlation function as a function of discrete time-lag values (&#x3c4;) for channel pairs () of the recording signal, evaluating the cross-correlation function by calculating a sampling function depending on a pitch parameter (f) and at least one spatial parameter (&#x3c6;), the sampling function assigning a value to every point of a multidimensional space being spanned by the pitch-parameter and the spatial parameters, and identifying peaks in said multidimensional space with respective acoustic sources in the multi-source environment.

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Graz, Austria

Marián Képesi