Sound Field Analysis and Microphone Array Processing in Rooms

Manuel Hahmann


While acoustic simulation techniques become part of architectural design processes, it is not yet possible to sense sound fields over large regions of space. Currently, spatial properties of a sound field can be derived from array measurements, but only in a confined region.  An immense effort must be made to cover large regions at a resolution anywhere near the human audible range.


We develop new methods that can reconstruct the full sound field from few observations, a so called acoustic hologram. Sparse array signal processing has shown potential to reconstruct information from under sampled data, but current methods reach their limits with the complexity of a large sound field. Using inherent properties of such sound fields and rooms, we obtain the acoustic hologram that then can be used to conserve and analyse acoustic properties of sound fields in large spaces.


A global 3D characterization of the acoustic space enables reconstruction, modeling and credible reproduction of specific sound fields. This can be used in various areas such as conservation of cultural heritage acoustics and reproduction of real spaces in virtual reality or enhancement of architectural design and analysis process.


Efrén Fernandez Grande, DTU Elektro


Manuel Hahmann
PhD student
DTU Electrical Engineering
+45 45 25 39 33