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Audio Quality Moderates Localisation Accuracy: Two Distinct Perceptual Effects
KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Music Acoustics. Nanyang Technological University, Singapore.ORCID iD: 0000-0001-8121-9263
Nanyang Technological University.
2015 (English)In: Proc. 138th Convention of the Audio Engineering Society, Warsaw, Poland: Audio Engineering Society, Inc., 2015Conference paper, Published paper (Refereed)
Abstract [en]

Audio quality is known to cross-modally influence reaction speed, sense of presence, and visual quality. We designed an experiment to test the effect of audio quality on source localisation. Stimuli with different MP3 compression rates, as a proxy for audio quality, were generated from drum samples. Participants (n = 18) estimated the position of a snare drum target while compression rate, masker, and target position were systematically manipulated in a full-factorial repeated-measures experiment design. Analysis of variance revealed that location accuracy was better in wide target positions than in narrow, with a medium effect size; and that the effect of target position was moderated by compression rate in different directions for wide and narrow targets. The results suggest that there might be two perceptual effects at play: one, whereby increased audio quality causes a widening of the soundstage, possibly via a SMARC-like mechanism, and two, whereby it enables higher localisation accuracy. In the narrow target positions in this experiment, the two effects acted in opposite directions and largely cancelled each other out. In the wide target presentations, their effects were compounded and led to significant correlations between compression rate and localisation error.

Place, publisher, year, edition, pages
Warsaw, Poland: Audio Engineering Society, Inc., 2015.
Keyword [en]
localisation, audio quality, crossmodal effect
National Category
Music Applied Psychology Fluid Mechanics and Acoustics
Research subject
Art, Technology and Design
Identifiers
URN: urn:nbn:se:kth:diva-177107OAI: oai:DiVA.org:kth-177107DiVA: diva2:871442
Conference
138th Convention of the Audio Engineering Society
Note

QC 20151117

Available from: 2015-11-14 Created: 2015-11-14 Last updated: 2015-11-18Bibliographically approved
In thesis
1. Sound perception and design in multimodal environments
Open this publication in new window or tab >>Sound perception and design in multimodal environments
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation is about sound in context. Since sensory processing is inherently multimodal, research in sound is necessarily multidisciplinary. The present work has been guided by principles of systematicity, ecological validity, complementarity of  methods, and integration of science and art. The main tools to investigate the mediating relationship of people and environment through sound have been empiricism and psychophysics. Four of the seven included papers focus on perception. In paper A, urban soundscapes were reproduced in a 3D installation. Analysis of results from an experiment revealed correlations between acoustic features and physiological indicators of stress and relaxation. Paper B evaluated soundscapes of different type. Perceived quality was predicted not only by psychoacoustic descriptors but also personality traits. Sound reproduction quality was manipulated in paper D, causing two effects on source localisation which were explained by spatial and semantic crossmodal correspondences. Crossmodal correspondence was central in paper C, a study of colour association with music. A response interface employing CIE Lab colour space, a novelty in music emotion research, was developed. A mixed method approach supported an emotion mediation hypothesis, evidenced in regression models and participant interviews. Three papers focus on design. Field surveys and acoustic measurements were carried out in restaurants. Paper E charted relations between acoustic, physical, and perceptual features, focussing on designable elements and materials. This investigation was pursued in Paper F where a taxonomy of sound sources was developed. Analysis of questionnaire data revealed perceptual and crossmodal effects. Lastly, paper G discussed how crossmodal correspondences facilitated creation of meaning in music by infusing ecologically founded sonification parameters with visual and spatial metaphors. The seven papers constitute an investigation into how sound affects us, and what sound means to us.

Abstract [sv]

Denna doktorsavhandling handlar om ljud i sammanhang. Eftersom informationsbehandling genom sinnena alltid är multimodal så kräver ljudforskning en tvärvetenskaplig forskningsansats. Arbetet i denna avhandling har vägletts av principer såsom systematik, ekologisk validitet, samspel mellan metoder, och integration av vetenskap och konst. De viktigaste redskapen för att undersöka den ömsesidiga påverkan mellan människa och miljö genom ljud har varit empiri och psykofysik.Fyra artiklar handlar om perception. I artikel A återskapades urbana ljudlandskap i en 3D-ljudinstallation. Analys av experimentresultat avslöjade samband mellan akustiska mått och fysiologiska markörer av stress och avslappning.  Artikel B utvärderade olika typer av ljudlandskap. Upplevd kvalitet kunde prediceras inte bara av psykoakustiska mått utan även av personlighetsdrag. Ljudåtergivningskvalitet manipulerades i artikel D och orsakade två effekter på lokalisering av en ljudkälla vilka förklarades av rumslig och semantisk korsmodala kopplingar. Korsmodalitet var huvudpunkten i artikel C, en studie av färgassociation till musik. Ett användargränssnitt utvecklades som använder färgrymden CIE Lab, en nyhet i forskningfältet musik och känslor. En abduktiv metod stödde hypotesen att känslouttryck medierar korsmodala kopplingar, vilket framgick av regressionsmodeller och intervjuer med försökspersonerna.Tre artiklar handlar om design. Fältundersökningar och ljudmätningar utfördes i restauranger. Artikel E kartlade samband mellan akustiska, fysiska och perceptuella särdrag, med fokus på formbara element och material. Detta arbete fortsattes i artikel F varigenom en taxonomi av ljudkällor utvecklades. Analys av enkätdata avslöjade perceptuella och korsmodala effekter. Slutligen, artikel G diskuterade hur korsmodala kopplingar främjade meningsskapande i musik genom att ekologiskt motiverade sonifikationsparametrar samverkade med visuella och spatiala uttryck. De sju artiklarna utgör landmärken i avhandlingens utforskande av hur ljud påverkar oss, och vad ljud betyder för oss.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. 67 p.
Series
TRITA-CSC-A, ISSN 1653-5723 ; 2015:17
Keyword
sound, perception, design, multimodal, environment, soundscape, music, listening, crossmodal, psychoacoustics, psychophysiology, personality trait, emotion, appraisal, aesthetics, colour, correlation, regression, classification, sonification
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Interaction Technologies Music Other Physics Topics Applied Psychology
Research subject
Speech and Music Communication
Identifiers
urn:nbn:se:kth:diva-177271 (URN)978-91-7595-771-5 (ISBN)
Public defence
2015-12-11, Kollegiesalen, Brinellvägen 8, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20151118

Available from: 2015-11-18 Created: 2015-11-17 Last updated: 2015-11-19Bibliographically approved

Open Access in DiVA

PaperD-Lindborg+Kwan-2015-Localisation(693 kB)125 downloads
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  • apa
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