TY - CHAP A1 - von Berg, Markus A1 - Schwörer, Paul A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - Analysis of physical and perceptual properties of room impulse responses: development of an online tool T2 - Forum Acusticuum 2023: 10th Convention of European Acoustics Association, Turin, Italy, 11th-15th September 2023 N2 - Over the past decades, research in room acoustics has established several derivative measures of an impulse response, some of which are incorporated in the ISO 3382 standards. These parameters intend to represent perceptual qualities, but were developed without a consistent modeling of room acoustical perception. More recent research proposed comprehensive inventories of room acoustic perception that are purely based on evaluations by human subjects, such as the Room Acoustical Quality Index (RAQI). In this work RA-QI scores acquired for 70 room impulse responses were predicted from room acoustical parameters. Except for Reverberance, the prediction of RAQI factors performed rather poor. In most cases, the sound source had a greater impact on RAQI scores. All analyses are published in an online tool, where users can upload omnidirectional and binaural impulse responses, and instantly obtain and visualize several physical descriptors, as well as predicted RAQI scores for three different sound sources. So far, acceptable prediction accuracy is achieved for Reverberance, Strength, Irregular Decay, Clarity and Intimacy. Larger data sets of evaluated impulse responses are required to improve the model performance and enable reliable predictions of room acoustical quality. Therefore, the administration of RAQI evaluations within the website is currently being developed. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-41955 PB - EAA ER - TY - GEN A1 - von Berg, Markus A1 - Schwörer, Paul A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - OPRA: Akustische Analyse musikalischer Aufführungsräume im Browser T2 - Akustik Journal N2 - Der Aufführungsraum leistet einen substantiellen Beitrag zum Erleben von Musikdarbietungen. Zur Beschreibung der Akustik von Aufführungsräumen haben sich dabei zahlreiche Messgrößen etabliert, welche bestimmte Wahrnehmungsqualitäten, wie z. B. die Halligkeit, abbilden sollen. Dem stellt jüngere Forschung rein perzeptive Messinventare gegenüber, die den Wahrnehmungseindruck als solchen, losgelöst vom physikalischen Ursprung, beschreiben. Dieser Artikel beschreibt einen Versuch, diese beiden Forschungsrichtungen zusammenzuführen, indem Bewertungen von Aufführungsräumen nach dem perzeptiven Room Acoustical Quality Index (RAQI) durch physikalische Messgrößen modelliert wurden, welche aus einfachen Impulsantwortmessungen ermittelt werden. Dazu wurde eine Auswahl raumakustischer Messgrößen auf fünf Dimensionen reduziert und diese als Prädiktoren für die einzelnen Wahrnehmungsgrößen des RAQI getestet. Die Berechnung dieser Prädiktionsmodelle wird vorgestellt und deren Präzision diskutiert. Anschließend wird die OPRA-Webanwendung vorgestellt, die sowohl die Berechnung der raumakustischen Messgrößen als auch die Prädiktion von RAQI-Wahrnehmungsgrößen für die drei Quellsignale Sprache, Orchester und Solotrompete im Browser ermöglicht. Auch wenn die Präzision der Prädiktionsmodelle noch nicht für alle RAQI-Faktoren zuverlässige Ergebnisse liefert, erlaubt OPRA eine umfangreiche akustische Analyse und eine erste Einschätzung der perzeptiven Wirkung von Aufführungsräumen. N2 - Performance spaces have a substantial influence on the experience of musical performances, and numerous physical measures have been proposed to describe different aspects of the perceptual impact singular of a performance space. Recent research complements these physical measures with purely perceptual inventories that describe the auditory impression as such, and somewhat detached from its physical origin. This article describes an attempt to bring these two research directions together by modelling evaluations of performance spaces according to the subject-centered Room Acoustical Quality Index (RAQI) based on physical measures obtained from simple impulse response measurements. A selection of room acoustical parameters was reduced to five dimensions which were tested then as predictors for the perceptual qualities of the RAQI. The calculation of these prediction models is presented and the models’ prediction performance discussed. Then, the OPRA-online-tool is presented that enables both the calculation of the physical measures and the prediction of RAQI factors for the three source signals speech, orchestra and solo trumpet within the web browser. Even though the precision of the prediction models does not yet provide reliable estimates of all RAQI factors, OPRA allows a first assessment of the perceptual effect of performance spaces on speech and music. T2 - OPRA: acoustical analysis of musical performance spaces in a web browser KW - Raumakustik KW - Webandwendung KW - akustische Wahrnehmung Y1 - 2023 UR - https://www.dega-akustik.de/fileadmin/dega-akustik.de/publikationen/akustik-journal/23-03/akustik_journal_2023_03_online_artikel4.pdf SN - 2569-1600 IS - 3 SP - 41 EP - 52 ER - TY - CHAP A1 - Von Berg, Markus A1 - Schwörer, Paul A1 - Prinz, Lukas A1 - Steffens, Jochen ED - Astolfi, Arianna ED - Asdrubali, Francesco ED - Shtrepi, Louena T1 - Analysis of physical and perceptual properties of room impulse responses: development of an online tool T2 - Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023, September 11 - 15, 2023,Torino, Italy N2 - Over the past decades, research in room acoustics has established several derivative measures of an impulse response, some of which are incorporated in the ISO 3382 standards. These parameters intend to represent perceptual qualities, but were developed without a consistent modeling of room acoustical perception. More recent research proposed comprehensive inventories of room acoustic perception that are purely based on evaluations by human subjects, such as the Room Acoustical Quality Index (RAQI). In this work RAQI scores acquired for 70 room impulse responses were predicted from room acoustical parameters. Except for Reverberance, the prediction of RAQI factors performed rather poor. In most cases, the sound source had a greater impact on RAQI scores. All analyses are published in an online tool, where users can upload omnidirectional and binaural impulse responses, and instantly obtain and visualize several physical descriptors, as well as predicted RAQI scores for three different sound sources. So far, acceptable prediction accuracy is achieved for Reverberance, Strength, Irregular Decay, Clarity and Intimacy. Larger data sets of evaluated impulse responses are required to improve the model performance and enable reliable predictions of room acoustical quality. Therefore, the administration of RAQI evaluations within the website is currently being developed. KW - Raumakustik KW - Konzertsaal KW - Webanwendung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-47929 SN - 978-88-88942-67-4 SN - 2221-3767 SP - 1647 EP - 1654 PB - European Acoustics Association CY - Turin, Italy ER -