Abstract
In this study, we propose an implementation of the cross-pattern coherence (CroPaC) spatialfiltering technique. This parametric algorithm utilizes the normalized cross-spectral density between signals from microphones of different orders as a criterion for focusing in specific directions and is implemented by using directional microphones placed in the same look direction and have the same magnitude and phase response. A spatial-filter is calculated from a multichannel input and is used to assign attenuation values to a coincidentally captured audio signal. The proposed algorithm is simple to implement and offers the capability of coping with interfering sources at different azimuthal locations with or without the presence of diffuse sound. In contrary to previous techniques, which rely on the performance of the beamformer for source focusing, CroPaC provides additional beamforming capabilities with increased performance at low frequencies. Significant improvement is demonstrated over traditional beamforming techniques in terms of noise reduction and focusing capabilities. Sound examples of the algorithm can be fond online in http://www.acoustics.hut.fi/projects/cropac/soundExamples/.
Original language | English |
---|---|
Title of host publication | Forum Acusticum, FA 2014 |
Publisher | European Acoustics Association |
Number of pages | 4 |
Volume | 2014-January |
ISBN (Electronic) | 9788361402282 |
Publication status | Published - 2014 |
MoE publication type | A4 Conference publication |
Event | Forum Acusticum - Kraków, Poland Duration: 7 Sept 2014 → 12 Sept 2014 Conference number: 7 |
Conference
Conference | Forum Acusticum |
---|---|
Abbreviated title | FA |
Country/Territory | Poland |
City | Kraków |
Period | 07/09/2014 → 12/09/2014 |