Department of Signal Processing and Acoustics

Communication acoustics: spatial sound and psychoacoustics

Capturing, transmission, reproduction, synthesis, and perception of sound - these are the fields that interest us in the communication acoustics team
Aalto University / Communication acoustics / photo: Ville Pulkki

Our projects are gathered around spatial sound. We have developed, and are still developing, new reproduction methods for spatial sound taking into account the time-frequency-space resolution of the human hearing. These methods are applicable to multi-channel loudspeaker layouts, headphones, and binaural hearing aids. Additionally, we are currently developing new types of non-linear beam-forming algorithms.

To enable the research of perceptually optimised spatial audio methods, we have to know more about the perceptual spatial hearing mechanisms of humans. We study these mechanisms with listening tests and model the brain mechanism devoted to spatial auditory perception. In this context, we are very interested in the perception of spatially complex sound scenes and the binaural perception of timbre.

Furthermore, we research acoustical measurement techniques for spatial sound. Here, the head-related acoustics are of vital importance in spatial hearing research, and we work on new modelling and measurement tools to understand the acoustical effects near the head and in the ear canals.

For this purpose, we must also inspect proper acoustical sources in measurements. Our current topic is the suitability of laser-induced shock waves as massless point sources. They can be applied to acoustical room measurements, and the technique is currently in active development.

European Union flag

This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 240453. The starting independent research project Technologies and Psychophysics of Spatial Sound (TEPESS) funded by European Research Council runs within the Communication acoustics team.

Latest publications

Circular harmonic processing with an ad-hoc smartphone array for speech enhancement

Vasileios Bountourakis, Nikolaos Vryzas, Charalampos Dimoulas 2022 152nd AES Convention

Cross-pattern coherence spatial filtering with hydrophone arrays for passive-sonar applications

Vasileios Bountourakis, Ville Pulkki 2022 Proceedings of the 24th International Congress on Acoustics: A19: Underwater Acoustics

Spatial post-filter for linear hydrophone arrays with applications to underwater source localisation

Vasileios Bountourakis, Leo McCormack, Ville Pulkki 2022 JASA Express Letters

Spatial Mixup: Directional Loudness Modification as Data Augmentation for Sound Event Localization and Detection

Ricardo Falcon Perez, Kazuki Shimada, Yuichiro Koyama, Shusuke Takahashi, Yuki Mitsufuji 2022 Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing

Enhancing binaural rendering of head-worn microphone arrays through the use of adaptive spatial covariance matching

Janani Fernandez, Leo Mccormack, Petteri Hyvärinen, Archontis Politis, Ville Pulkki 2022 Journal of the Acoustical Society of America

Sector-Based Encoding and Data Compression of Virtual Acoustic Scattering

Raimundo Gonzalez, Christoph Hold, Tapio Lokki, Archontis Politis 2022 2022 30th European Signal Processing Conference (EUSIPCO)

Near-Field Evaluation of Reproducible Speech Sources

Raimundo Gonzalez Diaz, Thomas McKenzie, Archontis Politis, Tapio Lokki 2022 Journal of the Audio Engineering Society

Analysis of multi-exponential and anisotropic sound energy decay

Georg Götz, Christoph Hold, Thomas McKenzie, Sebastian Schlecht, Ville Pulkki 2022
More information on our research in the Research database.
Research database
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