Paper published in a book (Scientific congresses and symposiums)
Measurement of 3D Room Impulse Responses with a Spherical Microphone Array
Embrechts, Jean-Jacques
2015In Proceedings of the Euronoise 2015 Congress
 

Files


Full Text
000334_Article in Proceedings.pdf
Publisher postprint (1.23 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] Directional room impulse responses (DRIRs) are composed of the sound contributions reaching a given location in the room from a well-defined direction in space. DRIRs can be useful in many applications, such as the evaluation of spatial room acoustics parameters, the detection of unwanted specular reflections or the 3D auralization of acoustic spaces. A spherical array containing 16 microphones has been realized to measure DRIRs. The logarithmic sinesweep technique is first applied to measure 16 impulse responses, one for each microphone. A spherical harmonics (SH) decomposition of the sound field is then obtained. Spatial aliasing, placement errors and the ‘white noise gain’ (WNG) have been analysed to define the useful bandwith of this measure, i.e. [250Hz – 4kHz]. The coefficients of the SH decomposition are then processed by some beamforming methods, in order to compute the DRIR in any direction around the spherical array. Time and 3D space representations can be generated. The results obtained in some rooms are illustrated in this paper: it is shown that the combination of the ‘delay-and-sum’ and ‘minimum-variance distorsionless response’ beamforming methods is particularly well suited for the analysis of DRIRs.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Embrechts, Jean-Jacques ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Techniques du son et de l'image
Language :
English
Title :
Measurement of 3D Room Impulse Responses with a Spherical Microphone Array
Alternative titles :
[fr] Mesures de réponses impulsionnelles acoustiques 3D à l'aide d'un réseau sphérique de microphones
Publication date :
June 2015
Event name :
Euronoise 2015
Event organizer :
European Acoustics Association
Event place :
Maastricht, Netherlands
Event date :
31 mai au 3 juin 2015
Audience :
International
Main work title :
Proceedings of the Euronoise 2015 Congress
Main work alternative title :
[en] Actes du congrès Euronoise 2015
Pages :
143-148
Available on ORBi :
since 06 March 2015

Statistics


Number of views
218 (5 by ULiège)
Number of downloads
787 (4 by ULiège)

Scopus citations®
 
1
Scopus citations®
without self-citations
1

Bibliography


Similar publications



Contact ORBi