Perceptual Evaluation of Mitigation Approaches of Impairments Due to Spatial Undersampling in Binaural Rendering of Spherical Microphone Array Data: Dry Acoustic Environments
Paper in proceeding, 2020

Employing a finite number of discrete microphones, instead of a continuous distribution according to theory, reduces the physical accuracy of sound field representations captured by a spherical microphone array. For a binaural reproduction of the sound field, a number of approaches have been proposed in the literature to mitigate the perceptual impairment when the captured sound fields are reproduced binaurally. We recently presented a perceptual evaluation of a representative set of approaches in conjunction with reverberant acoustic environments. This paper presents a similar study but with acoustically dry environments with reverberation times of less than 0.25 s. We examined the Magnitude Least-Squares algorithm, the Bandwidth Extraction Algorithm for Microphone Arrays, Spherical Head Filters, spherical harmonics Tapering, and Spatial Subsampling, all up to a spherical harmonics order of 7. Although dry environments violate some of the assumptions underlying some of the approaches, we can confirm the results of our previous study: Most approaches achieve an improvement whereby the magnitude of the improvement is comparable across approaches and acoustic environments.

Author

Tim Lübeck

TH Köln - University of Applied Sciences

Johannes M. Arend

TH Köln - University of Applied Sciences

Christoph Pörschmann

TH Köln - University of Applied Sciences

Hannes Helmholz

Chalmers, Architecture and Civil Engineering, Applied Acoustics

Jens Ahrens

Chalmers, Architecture and Civil Engineering, Applied Acoustics

Proceedings of the 23rd International Conference on Digital Audio Effects (eDAFx2020)

2413-6700 (ISSN) 2413-6689 (eISSN)

250-257

23rd International Conference on Digital Audio Effects
Vienna, ,

Binaural Rendering of Spherical Microphone Array Data

Oculus Inc., 2018-05-01 -- 2019-04-30.

Areas of Advance

Information and Communication Technology

Subject Categories

Signal Processing

Related datasets

MATERIALS: Perceptual Evaluation of Mitigation Approaches of Impairments due to Spatial Undersampling in Binaural Rendering of Spherical Microphone Array Data: Dry Acoustic Environments [dataset]

DOI: 10.5281/zenodo.3931629

More information

Created

11/15/2021