@inproceedings{vonBergPrinzSteffens2022, author = {von Berg, Markus and Prinz, Lukas and Steffens, Jochen}, title = {Comparing individual perception of timbre and reverberance}, address = {Gyeoungju, S{\"u}dkorea}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-38706}, pages = {5}, year = {2022}, abstract = {Room reverberation alters the spatial impression and timbre of a sound by modulating its spectral and temporal characteristics. Thus, we argue that, on a perceptual level, reverberation basically breaks down into interaural differences and spectro-temporal cues and that the separation of a perceived timbre into a sound source and a surrounding room is a purely cognitive process. To investigate the connection between the perception of reverberation cues and timbre analysis, the sensitivity for changes in reverberation was compared to timbre perception abilities. The Timbre Perception Test was used to measure the perception of the temporal envelope, spectral centroid, and spectral flux of artificial sounds. Sensitivity for changes in reverberation time was tested with a discrimination task using speech and noise with speech-alike spectral and temporal envelopes as source signals. Musical and acoustical expertise was assessed through the Goldsmiths Musical Sophistication Index and self-reports on experience with and knowledge of acoustics. There was a considerable correlation between timbre and reverberance perception ability, but timbre perception and academic experience predicted only 41\% of the variance in reverberance perception. Still, perception abilities related to similar acoustical phenomena seem to be better indicators of listening skills than self-reports on acoustical or musical expertise.}, language = {en} } @inproceedings{vonBergSchwoererPrinzetal.2023, author = {von Berg, Markus and Schw{\"o}rer, Paul and Prinz, Lukas and Steffens, Jochen}, title = {Analysis of physical and perceptual properties of room impulse responses: development of an online tool}, series = {Forum Acusticuum 2023: 10th Convention of European Acoustics Association, Turin, Italy, 11th-15th September 2023}, booktitle = {Forum Acusticuum 2023: 10th Convention of European Acoustics Association, Turin, Italy, 11th-15th September 2023}, publisher = {EAA}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-41955}, pages = {8}, year = {2023}, abstract = {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.}, language = {en} } @misc{vonBergSchwoererPrinzetal.2023, author = {von Berg, Markus and Schw{\"o}rer, Paul and Prinz, Lukas and Steffens, Jochen}, title = {OPRA: Akustische Analyse musikalischer Auff{\"u}hrungsr{\"a}ume im Browser}, series = {Akustik Journal}, journal = {Akustik Journal}, number = {3}, issn = {2569-1600}, pages = {41 -- 52}, year = {2023}, abstract = {Der Auff{\"u}hrungsraum leistet einen substantiellen Beitrag zum Erleben von Musikdarbietungen. Zur Beschreibung der Akustik von Auff{\"u}hrungsr{\"a}umen haben sich dabei zahlreiche Messgr{\"o}ßen etabliert, welche bestimmte Wahrnehmungsqualit{\"a}ten, wie z. B. die Halligkeit, abbilden sollen. Dem stellt j{\"u}ngere Forschung rein perzeptive Messinventare gegen{\"u}ber, die den Wahrnehmungseindruck als solchen, losgel{\"o}st vom physikalischen Ursprung, beschreiben. Dieser Artikel beschreibt einen Versuch, diese beiden Forschungsrichtungen zusammenzuf{\"u}hren, indem Bewertungen von Auff{\"u}hrungsr{\"a}umen nach dem perzeptiven Room Acoustical Quality Index (RAQI) durch physikalische Messgr{\"o}ßen modelliert wurden, welche aus einfachen Impulsantwortmessungen ermittelt werden. Dazu wurde eine Auswahl raumakustischer Messgr{\"o}ßen auf f{\"u}nf Dimensionen reduziert und diese als Pr{\"a}diktoren f{\"u}r die einzelnen Wahrnehmungsgr{\"o}ßen des RAQI getestet. Die Berechnung dieser Pr{\"a}diktionsmodelle wird vorgestellt und deren Pr{\"a}zision diskutiert. Anschließend wird die OPRA-Webanwendung vorgestellt, die sowohl die Berechnung der raumakustischen Messgr{\"o}ßen als auch die Pr{\"a}diktion von RAQI-Wahrnehmungsgr{\"o}ßen f{\"u}r die drei Quellsignale Sprache, Orchester und Solotrompete im Browser erm{\"o}glicht. Auch wenn die Pr{\"a}zision der Pr{\"a}diktionsmodelle noch nicht f{\"u}r alle RAQI-Faktoren zuverl{\"a}ssige Ergebnisse liefert, erlaubt OPRA eine umfangreiche akustische Analyse und eine erste Einsch{\"a}tzung der perzeptiven Wirkung von Auff{\"u}hrungsr{\"a}umen.}, language = {de} }