Subjective evaluation of spatial analysis and synthesis methods using different microphone arrays

Alan Pawlak, Hyunkook Lee, Aki Makivirta, Thomas Lund

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Multiple spatial analysis and synthesis methods were proposed up to this date, however, there is still a lack of scientific evidence to conclude how proposed methods and measurement setups compare to each other. This paper presents a subjective study that investigates how spatial analysis and synthesis method affects spatial and timbral fidelities of the binaural renderings for three different stimuli and three source positions. Evaluated positions: (a) +30°, (b) +90°, (c) +135° were motivated by the 4+7+0 loudspeaker layout from the ITU-R BS.2051-2 recommendation. Spatial room impulse responses were measured in the ITU-R BS.1116-compliant listening room using two different microphone arrays. Measurements were used to create auralisations from Spatial Decomposition Method (SDM) and Higher-Order Spatial Impulse Response Rendering (HO-SIRR). The test conditions were selected to investigate: (i) rendering method (ii) direction of arrival (DOA) estimation method, (iii) microphone array, (iv) use of a dedicated centre reference microphone with SDM and (v) band-pass filtering of the spatial room impulse responses prior to the TDOA-based DOA estimation and DOA enforcement for the direct sound. The listening experiment followed MUSHRA-like methodology with a hidden reference, employing a five-grade similarity scale. Subjects' task was to evaluate how similar the test conditions are to the reference (measured BRIR) with regard to the assessed attribute. This article includes a short review of the existing methods, describes the experimental design and presents the results of the formal listening tests followed by the discussion.

Original languageEnglish
Title of host publication2021 Immersive and 3D Audio
Subtitle of host publicationFrom Architecture to Automotive, I3DA 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Electronic)9781665409988
ISBN (Print)9781665409995
DOIs
Publication statusPublished - 23 Nov 2021
Event2021 Immersive and 3D Audio: From Architecture to Automotive - Bologna, Italy
Duration: 8 Sep 202110 Sep 2021

Publication series

Name2021 Immersive and 3D Audio: From Architecture to Automotive, I3DA 2021

Conference

Conference2021 Immersive and 3D Audio: From Architecture to Automotive
Abbreviated titleI3DA 2021
Country/TerritoryItaly
CityBologna
Period8/09/2110/09/21

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