A GENERALIZED DESIGN METHOD FOR DIRECTIVITY PATTERNS OF SPHERICAL MICROPHONE ARRAYS

Date

2011-05-27

Author

De Sena, Enzo
Hacıhabiboğlu, Hüseyin
Cvetkovic, Zoran

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

179
views

0
downloads

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, subcardioid, hypercardioid and supercardioid - are particular solutions of this optimization problem with specific values of two free parameters: the angle of the frontal sector, and the convex combination factor. By varying these two parameters, more general solutions of practical use are obtained.

Subject Keywords

Microphones, Directivity Pattern, Beamforming, Spherical Microphone Array

URI

https://hdl.handle.net/11511/55539

Conference Name

IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Collections

Graduate School of Informatics, Conference / Seminar

Suggestions

OpenMETU
Core

ON THE ACCURACY OF OPEN SPHERICAL MICROPHONE ARRAYS FOR MEASURING ACOUSTIC INTENSITY Hacıhabiboğlu, Hüseyin (2013-10-23) Acoustic intensity can be used for different purposes such as sound source localisation, source separation and spatial audio object coding. Three-dimensional measurement of the acoustic intensity requires the design of special microphone arrays. A theoretical analysis and numerical simulations of intensity measurements using open spherical microphone arrays are presented in this paper. The calculation of the acoustic intensity using signals from an open spherical microphone array is presented first. Error m...
3D perceptual soundfield reconstruction via sound field extrapolation Erdem, Eg; Hacıhabiboğlui Hüseyin.; Department of Multimedia Informatics (2020) 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...
On the Design and Implementation of Higher Order Differential Microphones De Sena, Enzo; Hacıhabiboğlu, Hüseyin; Cvetkovic, Zoran (2012-01-01) A novel systematic approach to the design of directivity patterns of higher order differential microphones is proposed. The directivity patterns are obtained by optimizing a cost function which is a convex combination of a front-back energy ratio and uniformity within a frontal sector of interest. Most of the standard directivity patterns-omnidirectional, cardioid, subcardioid, hypercardioid, supercardioid-are particular solutions of this optimization problem with specific values of two free parameters: the...
A Robust Normalization Method for fMRI Data for Brain Decoding Yildiz, Ozan; Dogan, Fethiye Irmak; GİLLAM, İLKE; Mizrak, Eda; Yarman Vural, Fatoş Tunay (2016-05-19) Functional Magnetic Resonance Imaging (fMRI) methods produce high dimensional representation of cognitive processes under heavy noise due to the limitations of hardware and measurement techniques. In order to reduce the noise and extract useful information from the fMRI data, a sequence of pre-processing techniques, such as smoothing with spatial filters and z-scoring, are used. In this study, we suggest an additional normalization technique based upon a statistical property of fMRI data. We, first, define ...
AN AUTOMATIC MODE MATCHING SYSTEM FOR A HIGH Q-FACTOR MEMS GYROSCOPE USING A DECOUPLED PERTURBATION SIGNAL Yesil, F.; Alper, S. E.; Akın, Tayfun (2015-06-25) This paper reports a closed-loop controller system developed for in-run automatic matching of the drive and sense mode resonance frequencies of a MEMS gyroscope with a high quality factor (Q). This is achieved by injecting a perturbation signal to the quadrature cancellation loop, while keeping it decoupled from the angular rate control loop. The new controller is implemented in a CMOS ASIC together with the other sensor control loops, and it is verified to maintain matched-mode state under changing environ...

Citation Formats

E. De Sena, H. Hacıhabiboğlu, and Z. Cvetkovic, “A GENERALIZED DESIGN METHOD FOR DIRECTIVITY PATTERNS OF SPHERICAL MICROPHONE ARRAYS,” presented at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Prague, CZECH REPUBLIC, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55539.