3D perceptual soundfield reconstruction via sound field extrapolation

Download
2020
Erdem, Eg
Perceptual sound field reconstruction (PSR) is a spatial audio recording and reproduction method based on the application of stereophonic panning laws in microphone array design. PSR allows rendering a perceptually veridical and stable auditory perspective in the horizontal plane of the listener, and involves recording using nearcoincident microphone arrays. This thesis extends the two dimensional PSR concept to three dimensions and allows reconstructing an arbitrary sound field based on measurements with a rigid spherical microphone array. This work offers a method for emulating near coincident microphone recordings by using rigid spherical microphone arrays via sound field extrapolation carried out in the spherical harmonic domain. An active-intensity-based analysis of the rendered sound field shows that the proposed approach can render direction of monochromatic plane waves accurately even with a straightforward extension of PSR directivity patterns designed for the 2D case. For the real recordings, listening tests are conducted using multi-channel audio recordings of the reconstructed sound field and compared with higher order Ambisonics recordings.

Suggestions

Perceptual Soundfield Reconstruction in Three Dimensions via Sound Field Extrapolation
Erdem, Ege; De Sena, Enzo; Hacıhabiboğlu, Hüseyin; Cvetkovic, Zoran (2019-05-01)
Perceptual sound field reconstruction (PSR) is a spatial audio recording and reproduction method based on the application of stereophonic panning laws in microphone array design. PSR allows rendering a perceptually veridical and stable auditory perspective in the horizontal plane of the listener, and involves recording using nearcoincident microphone arrays. This paper extends the PSR concept to three dimensions using sound field extrapolation carried out in the spherical-harmonic domain. Sound field render...
A GENERALIZED DESIGN METHOD FOR DIRECTIVITY PATTERNS OF SPHERICAL MICROPHONE ARRAYS
De Sena, Enzo; Hacıhabiboğlu, Hüseyin; Cvetkovic, Zoran (2011-05-27)
Spherical microphone arrays provide a flexible solution to obtaining higher-order directivity patterns, which are useful in audio recording and reproduction. A general systematic approach to the design of directivity patterns for spherical microphone arrays is introduced in this paper. The directivity patterns are obtained by optimizing a cost function which is a convex combination of a front-back energy ratio and a smoothness term. Most of the standard directivity patterns - i.e. omnidirectional, cardioid,...
A comparative analysis of matched field processors for underwater acoustic source localization
Sarıkaya, Tevfik Bahadır; Çiloğlu, Tolga; Department of Electrical and Electronics Engineering (2010)
In this thesis, localization of the underwater sound sources using matched field processing technique is considered. Localization of the underwater sound sources is one of the most important problems encountered in underwater acoustics and signal processing. Many techniques were developed to localize sources in range, depth and bearing angle. However, most of these techniques do not consider or only slightly takes into account the environmental factors that dramatically effect the propagation of underwater ...
SOUND SOURCE LOCALISATION PERFORMANCE OF OPEN SPHERICAL ACOUSTIC INTENSITY PROBES UNDER REVERBERANT CONDITIONS
Hacıhabiboğlu, Hüseyin (2014-04-25)
Open-spherical acoustic intensity probes are microphone arrays based on the Kirchhoff-Helmholtz integral and are used in the measurement of active acoustic intensity. The acoustic intensity measurements obtained by these arrays can be used to localise sound sources. Previously, the performance of these arrays in acoustic free field conditions were obtained using numerical simulations and it was shown that they provide better performance than other types of probes. This paper discusses the implementation of ...
Rotation Calibration of Rigid Spherical Microphone Arrays for Multi-perspective 6DoF Audio Recordings
Olgun, Orhun; Erdem, Ege; Hacıhabiboğlu, Hüseyin (2021-09-08)
The preferred approach for multi-perspective six-degrees-of-freedom (6DoF) audio involves using multiple rigid spherical microphone arrays (RSMA) that can capture higher-order Ambisonics. RSMAs are spherically symmetric and allow the calculation of the local decomposition of sound fields over spherical harmonic functions. When multiple such arrays are used, multiple scattering occurs that can be equalized via methods that rely on multipole expansions if the positions of the arrays are known and the coordina...
Citation Formats
E. Erdem, “3D perceptual soundfield reconstruction via sound field extrapolation,” Thesis (M.S.) -- Graduate School of Informatics. Multimedia Informatics., Middle East Technical University, 2020.