TY - CHAP A1 - von Berg, Markus A1 - Prinz, Lukas A1 - Steffens, Jochen T1 - Comparing individual perception of timbre and reverberance BT - Proceedings of the 24th International Congress on Acoustics N2 - 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. KW - Timbre KW - Klangfarbe KW - Reverberation KW - Nachhall Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-38706 UR - https://ica2022korea.org/data/Proceedings_A11.pdf PB - International Commission for Acoustics CY - Gyeoungju, Südkorea ER - TY - CHAP A1 - Rakow, Thomas C. A1 - Faeskorn-Woyke, Heide A1 - Saatz, Inga Marina A1 - Knolle, Harm ED - Reuss, Pascal ED - Eisenstadt, Viktor ED - Schönborn, Jakob ED - Schäfer, Jero T1 - OER Tools and Courses for Teaching Database Systems as Developed in the Project EILD.nrw T2 - LWDA’22: Lernen, Wissen, Daten, Analysen. October 05–07, 2022, Hildesheim, Germany N2 - In the EILD.nrw project, Open Educational Resources (OER) are being developed for teaching databases. Instructors can use the tools and courses in a variety of learning scenarios. Students of computer science and application subjects learn the complete life cycle of databases. For this purpose, quizzes, interactive tools, instructional videos, and courses for learning management systems are developed and published under a Creative Commons license. KW - Database systems KW - OER KW - higher education Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-40622 UR - https://ceur-ws.org/Vol-3341/DB-LWDA_2022_CRC_1804.pdf SN - 1613-0073 VL - CEUR Workshop Proceedings: 3341 PB - CEUR-WS CY - Aachen ER - TY - GEN T1 - 1040 - Erste Satzung zur Änderung der Prüfungsordnung (studiengangspezifische Bestimmungen) für den Masterstudiengang Medieninformatik an der Hochschule Düsseldorf vom 11.12.2025 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1040 KW - Amtliche Mitteilungen Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58858 CY - Düsseldorf ER - TY - JOUR A1 - Weinzierl, Stefan A1 - Lepa, Steffen A1 - Ackermann, David T1 - A measuring instrument for the auditory perception of rooms: The Room Acoustical Quality Inventory (RAQI) JF - The Journal of the Acoustical Society of America N2 - With the Room Acoustical Quality Inventory (RAQI), a measuring instrument for the perceptual space of performance venues for music and speech has been developed. First, a focus group with room acoustical experts determined relevant aspects of room acoustical impression in the form of a comprehensive list of 50 uni- and bipolar items in different categories. Then, n = 190 subjects rated their acoustical impression of 35 binaurally simulated rooms from 2 listening positions, with symphonic orchestra, solo trumpet, and dramatic speech as audio content. Subsequent explorative and confirmative factor analyses of the questionnaire data resulted in three possible solutions with four, six, and nine factors of room acoustical impression. The factor solutions, as well as the related RAQI items, were tested in terms of reliability, validity, and several types of measurement invariance, and were cross-validated by a follow-up experiment with a subsample of 46% of the original participants, which provided re-test reliabilities and stability coefficients for all RAQI constructs. The resulting psychometrically evaluated measurement instrument can be used for room quality assessment, acoustical planning, and the further development of room acoustical parameters in order to predict primary acoustical qualities of venues for music and speech. Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58954 SN - 0001-4966 VL - 144 IS - 3 SP - 1245 EP - 1257 PB - Acoustical Society of America ER - TY - THES A1 - Ackermann, David T1 - Dynamic Sound Sources for Virtual Acoustic Reality: Description, Implementation and Evaluation N2 - terns, especially those presented by natural sources such as musical instruments or human voices, is crucial. While static sound sources, such as loudspeakers, have a relatively consistent acoustic footprint, dynamic sources present a multi-faceted set of challenges. Musical instruments, for example, have dynamic radiation patterns. The directivity of these instruments changes not only with frequency, but also with the specific note being played, and with the performer's gestures. These dynamic effects of directivity influences both the perceived loudness and the timbre at a given location within the audience and shapes the spatial characteristics of the sound field produced. This modulation is crucial when recreating authentic acoustic environments, whether in a virtual environment or in real-world architectural designs. Essentially, for an acoustic simulation to be considered accurate, it must capture these nuances. The intricate interplay of directivity, pitch and motion significantly shapes the listening experience and requires deeper integration of these elements into future simulations and designs. N2 - Die computergestützte Akustiksimulation ist zu einem wichtigen Instrument für die Gestaltung verschiedener akustischer Umgebungen geworden. Das Verständnis der komplexen Abstrahlungsmuster, insbesondere von natürlichen Quellen wie Musikinstrumenten oder menschlichen Stimmen, ist dabei von entscheidender Bedeutung. Während statische Schallquellen, wie z. B. Lautsprecher, einen relativ konsistenten akustischen Fußabdruck haben, stellen dynamische Quellen eine Reihe von Herausforderungen dar. Musikinstrumente zum Beispiel haben dynamische Abstrahlungsmuster. Die Richtwirk- ung dieser Instrumente ändert sich nicht nur mit der Frequenz, sondern auch mit der gespielten Note und mit den Gesten der Interpret*innen. Diese dynamischen Effekte der Richtcharakteristik beeinflussen sowohl die wahrgenommene Lautstärke als auch die Klangfarbe an einem bestimmten Ort im Publikum und formen die räumlichen Eigenschaften des erzeugten Klangfeldes. Diese Modulation ist entscheidend für die Nachbildung authentischer akustischer Umgebungen, sei es in einer virtuellen Umgebung oder in realen architektonischen Designs. Damit eine akustische Simulation als akkurat gelten kann, muss sie diese Nuancen erfassen. Das komplexe Zusammenspiel von Richtwirkung, Tonhöhe und Bewegung prägt signifikant das Hörerlebnis und erfordert eine tiefere Integration dieser Elemente in künftige Simulationen und Designs. KW - Musikalische Akustik KW - Virtuelle Akustik KW - virtual acoustics KW - musical acoustics KW - sound sources KW - Schallquellen Y1 - 2024 U6 - https://doi.org/10.14279/depositonce-19949 PB - TU Berlin CY - Berlin ER - TY - JOUR A1 - Brinkmann, Fabian A1 - Aspöck, Lukas A1 - Ackermann, David A1 - Lepa, Steffen A1 - Vorländer, Michael A1 - Weinzierl, Stefan T1 - A Round Robin on Room Acoustical Simulation and Auralization JF - Journal of the Acoustical Society of America N2 - A round robin was conducted to evaluate the state of the art of room acoustic modeling software both in the physical and perceptual realms. The test was based on six acoustic scenes highlighting specific acoustic phenomena and for three complex, “real-world” spatial environments. The results demonstrate that most present simulation algorithms generate obvious model errors once the assumptions of geometrical acoustics are no longer met. As a consequence, they are neither able to provide a reliable pattern of early reflections nor do they provide a reliable prediction of room acoustic parameters outside a medium frequency range. In the perceptual domain, the algorithms under test could generate mostly plausible but not authentic auralizations, i.e., the difference between simulated and measured impulse responses of the same scene was always clearly audible. Most relevant for this perceptual difference are deviations in tone color and source position between measurement and simulation, which to a large extent can be traced back to the simplified use of random incidence absorption and scattering coefficients and shortcomings in the simulation of early reflections due to the missing or insufficient modeling of diffraction. Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-59034 SN - 0001-4966 VL - 145 IS - 4 SP - 2746 EP - 2760 PB - Acoustical Society of America ER - TY - JOUR A1 - Ackermann, David A1 - Brinkmann, Fabian A1 - Zotter, Franz A1 - Kob, Malte A1 - Weinzierl, Stefan T1 - Comparative Evaluation of Interpolation Methods for the Directivity of Musical Instruments JF - EURASIP Journal on Audio, Speech, and Music Processing N2 - Measurements of the directivity of acoustic sound sources must be interpolated in almost all cases, either for spatial upsampling to higher resolution representations of the data, for spatial resampling to another sampling grid, or for use in simulations of sound propagation. The performance of different interpolation techniques applied to sparsely sampled directivity measurements depends on the sampling grid used but also on the radiation pattern of the sources themselves. Therefore, we evaluated three established approaches for interpolation from a low-resolution sampling grid using high-resolution measurements of a representative sample of musical instruments as a reference. The smallest global error on average occurs for thin plate pseudo-spline interpolation. For interpolation based on spherical harmonics (SH) decomposition, the SH order and the spatial sampling scheme applied have a strong and difficult to predict influence on the quality of the interpolation. The piece-wise linear, spherical triangular interpolation provides almost as good results as the first-order spline approach, albeit with on average 20 times higher computational effort. Therefore, for spatial interpolation of sparsely sampled directivity measurements of musical instruments, the thin plate pseudo-spline method applied to absolute-valued data is recommended and, if necessary, a subsequent modeling of the phase KW - Source directivity KW - Spatial interpolation KW - Musical instruments Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58992 SN - 1687-4722 VL - 2021 IS - 1 PB - Springer Nature ER - TY - JOUR A1 - Ackermann, David A1 - Brinkmann, Fabian A1 - Weinzierl, Stefan T1 - Musical instruments as dynamic sound sources JF - Journal of the Acoustical Society of America N2 - Unlike electro-acoustic sound sources, musical instruments have a time-varying, dynamic directivity, due to the note-dependent radiation behavior of the instrument and due to the expressive movements that musicians perform with their instrument. While previous studies have generally examined the directivity of the static, unmoved instrument for specific notes played, we show the individual and combined contributions of these two factors to a temporal modulation of the radiation behavior, based on motion tracking of typical movement patterns for all instruments of a classical symphony orchestra and on the directivity measured for all partials over the entire pitch range of these instruments. The effect of this modulation, which is manifested by changes in timbre and room acoustic excitation, was determined by spectral variations in the free field and under reverberant conditions, as well as by a modulation of room acoustic parameters. Our results show that these effects are well above the just noticeable differences for all musical instruments and all perceptual variables considered. While the effect of motion dominates for brass instruments, string and woodwind instruments exhibit large note-related differences, which should be taken into account in virtual acoustic realities if an auditory liveliness comparable to physical reality is to be achieved. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58972 SN - 1520‑8524 VL - 155 SP - 2302 EP - 2313 PB - Acoustical Society of America ER - TY - JOUR A1 - Ackermann, David A1 - Böhm, Christoph A1 - Brinkmann, Fabian A1 - Weinzierl, Stefan T1 - The Acoustical Effect of Musicians’ Movements During Musical Performances JF - Acta Acustica united with Acustica N2 - Acoustic musical instruments act as dynamic sound sources communicating the expressive intentions of a performer to the audience in a dedicated spatial environment. From an acoustical point of view, the directivity of musical instruments is relevant both for the loudness and timbre of an instrument at a certain position in the audience, as well as for the spatial characteristics of the generated sound field. Musical instruments, however, are dynamic sound sources always moved by musicians as an element of their performance on stage. This work aims at assessing the acoustical effect and the perceptual relevance of these movements. For this purpose, we have recorded solo musical performances with all standard orchestral instruments with an optical motion tracking system, as well as the corresponding audio signals. The effect of the movements was evaluated by analysing the spectral fluctuation and the time-dependence of room acoustical parameters in a virtual acoustic environment in anechoic and reverberant conditions. In a subsequent listening test, an auralization of the static and dynamic musical performance was presented to listeners by binaural synthesis, showing that the signal-related fluctuations are clearly audible both in anechoic and reverberant situations. We discuss different approaches how to consider these effects for the simulation of natural acoustic sources in virtual acoustic reality. Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-59024 SN - 1861-9959 VL - 105 IS - 2 SP - 356 EP - 367 PB - Hirzel ER - TY - JOUR A1 - Ackermann, David A1 - Brinkmann, Fabian A1 - Weinzierl, Stefan T1 - A Database with Directivities of Musical Instruments JF - Journal of the Audio Engineering Society Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58923 SN - 1549-4950 VL - 72 IS - 3 SP - 170 EP - 179 PB - Audio Engineering Society ER - TY - JOUR A1 - von Berg, Markus A1 - Wolf, Anna-Christina A1 - Steffens, Jochen T1 - Age- and Sex-Related Differences in Music Requests on a Radio Show for Children JF - Music & Science N2 - In research on the development of musical preferences, children are often asked either to evaluate musical pieces that have been previously selected by adult experimenters, or to give self-reports on preferences for different musical styles. This study involved analyzing a sample of 1,412 freely and publicly expressed music requests from children aged between 4 and 11 years taken from a German radio program, with regard to age- and sex-specific differences. The music was categorized into genres, as listed on Spotify, and examined using methods of music information retrieval provided by the Spotify Developer application programming interface. Results showed that, at younger ages, the requests were generally more evenly distributed across different genres. Regarding single genres, we observed small positive relationships between age and the likelihood of requesting the genres pop or electro and small negative relationships between age and the likelihood of requesting A capella, German songwriter, indie, theme songs, or children's music. Furthermore, we found that boys requested significantly more rock or hip-hop, whereas girls had a higher tendency to ask for pop. Finally, age- (but no sex-) related differences regarding the Spotify features of valence and liveness of the requested music were found, which were related to the preference for children's music at younger ages. The results thus suggest that previous findings regarding differences between boys and girls and an increasing formation of distinct genre preferences during infancy also apply to single song requests made on a radio show. KW - children’s music KW - children’s musical preferences KW - genre preferences KW - music requests KW - musical identity KW - DFG Publikationskosten KW - HSD Publikationsfonds Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46588 SN - 2059-2043 N1 - Funding: Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 532148125 and supported by the central publication fund of Hochschule Düsseldorf University of Applied Sciences. VL - 7 SP - 1 EP - 16 PB - Sage Publications ER - TY - GEN T1 - 1042 - Zweite Satzung zur Änderung der Fachbereichsordnung für den Fachbereich Medien der Hochschule Düsseldorf vom 13.01.2026 N2 - Aufgrund der §§ 2 Abs. 4 S. 1, 26 Abs. 3 S. 2 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung und der Grundordnung der Hochschule Düsseldorf vom 08.10.2015 (Verkündungsblatt der Hochschule Düsseldorf, Amtliche Mitteilung Nr. 414) in der aktuell gültigen Fassung hat der Fachbe-reich Medien der Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1042 KW - Amtliche Mitteilungen Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-59948 CY - Düsseldorf ER - TY - CHAP A1 - Triebus, Charlotte A1 - Druzetic-Vogel, Ivana A1 - Geiger, Christian T1 - Precious Camouflage - Artistic Research for the Creation of a Dance Piece with Humans and AI T2 - Proceedings of the Conference on Animation and Interactive Art Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60099 SN - 979-8-4007-1532-7 SP - 188 EP - 198 PB - ACM CY - New York, NY, USA ER - TY - CHAP A1 - Geiger, Christian A1 - Ali, Soren A1 - Dilchert, Philipp ED - Olivero, Lucas Fabian ED - Stark, Maja ED - Schürrer, Dagmar ED - Israel, Johann Habakuk T1 - The BildKlangPoet - a Framework for Designing Mixed Reality Painting Experiences Using Generative AI T2 - Proceedings of the 22nd International Conference on Culture and Computer Science: Remixing Analog and Digital (KUI ’25), September 25, 26, 2025, Berlin, Germany KW - MIREVI KW - Applied Computing KW - Arts and Humanities KW - Media Arts Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60086 SN - 979-8-4007-1478-8/2025/09 SP - 1 EP - 4 PB - ACM CY - New York, NY, USA ER - TY - JOUR A1 - Steffens, Jochen A1 - Blättermann, Patrick A1 - Sattler, Maximilian A1 - Tang, Kevin T1 - How does a credible voice sound? JF - The Journal of the Acoustical Society of America N2 - Credibility is a crucial social factor that influences people's perception and decision-making. This study explores the acoustic attributes that define credible speech compared to neutral and ironic speech. A custom-built German corpus was developed, containing speech samples recorded from amateurs to enhance ecological validity. The study extracted a broad set of audio features from these samples, employing recursive feature elimination to identify the most influential attributes. These were then analyzed using a machine-learning-supported multinomial logistic regression model. The results indicated significant differences in the acoustic features associated with credible speech compared to neutral and ironic speech. Key findings include the role of a higher energy level (1st mel-frequency cepstral coefficient) in credible compared to neutral and ironic speech and a higher speaking rate in both credible and ironic compared to neutral speech. Also, irony is characterized by more high-frequency content (mean spectral centroid) compared to credible or neutral speech. Gender differences in spoken irony involve a greater influence of speaking rate in women's speech, while high pitch plays a more significant role in men's speech. This research thus contributes to the understanding of how credibility is conveyed through speech and offers insights for applications in communication, media, and artificial intelligence. The study also highlights the methodological advancements made by incorporating a diverse range of acoustic features and employing a robust machine-learning framework. KW - Sprechen KW - Glaubwürdigkeit KW - Akustik Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-53133 SN - 1520-8524 VL - 157 IS - 5 SP - 3780 EP - 3792 PB - Acoustical Society of America ER - TY - GEN T1 - 1059 - Gleichstellungsquoten für die Fachbereiche Architektur, Design, Elektro- und Informationstechnik, Maschinenbau und Verfahrenstechnik, Medien und Wirtschaftswissenschaften der Hochschule Düsseldorf gemäß § 37a HG vom 31.03.2026 N2 - Gemäß § 37a des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz – HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat das Präsidium im Einvernehmen mit der jeweiligen Dekanin bzw. dem jeweiligen Dekan die folgenden Gleichstellungsquoten (Gender-Diversity-Faktoren; § 3 Berufungsordnung der HSD vom 04.10.2016) für die Dauer von drei Jahren ab dem 01.01.2026 festgesetzt: T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1059 KW - Amtliche Mitteilungen Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-61318 CY - Düsseldorf ER -