TY - CHAP A1 - Feistel, Stefan A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Using High-Resolution Directivity Data of Musical Instruments for Acoustic Simulation and Auralization T2 - Proceedings of the 155th Audio Engineering Society Conventio, New York, 25-27th of October 2023. Y1 - 2023 PB - Audio Engineering Society ER - TY - JOUR A1 - von Berg, Markus A1 - Steffens, Jochen A1 - Weinzierl, Stefan A1 - Müllensiefen, Daniel T1 - Assessing room acoustic listening expertise JF - Journal of the Acoustical Society of America N2 - Musicians and music professionals are often considered to be expert listeners for listening tests on room acoustics. However, these tests often target acoustic parameters other than those typically relevant in music such as pitch, rhythm, amplitude, or timbre. To assess the expertise in perceiving and understanding room acoustical phenomena, a listening test battery was constructed to measure the perceptual sensitivity and cognitive abilities in the identification of rooms with different reverberation times and different spectral envelopes. Performance in these tests was related to data from the Goldsmiths Musical Sophistication Index, self-reported previous experience in music recording and acoustics, and academic knowledge on acoustics. The data from 102 participants show that sensory and cognitive abilities are both correlated significantly with musical training, analytic listening skills, recording experience, and academic knowledge on acoustics, whereas general interest in and engagement with music do not show any significant correlations. The regression models, using only significantly correlated criteria of musicality and professional expertise, explain only small to moderate amounts (11%–28%) of the variance in the “room acoustic listening expertise” across the different tasks of the battery. Thus, the results suggest that the traditional criteria for selecting expert listeners in room acoustics are only weak predictors of their actual performances. Y1 - 2021 U6 - https://doi.org/10.1121/10.0006574 VL - 150 IS - 4 SP - 2539 EP - 2548 PB - Acoustical Society of America ER - TY - CHAP A1 - von Berg, Markus A1 - Steffens, Jochen A1 - Müllensiefen, Daniel A1 - Weinzierl, Stefan T1 - Gibt es raumakustische Hörexpertise? T2 - Fortschritte der Akustik - DAGA 2020: 46. Deutsche Jahrestagung für Akustik Y1 - 2020 U6 - https://doi.org/10.14279/depositonce-9998 SP - 858 EP - 861 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Böldt, Sebastian A1 - Steffens, Jochen A1 - Büttner, Clemens A1 - Weinzierl, Stefan T1 - Modellierung von Publikumsgeräuschen bei Veranstaltungen mit Sprache und Musik T2 - Fortschritte der Akustik - DAGA 2020: 46. Deutsche Jahrestagung für Akustik Y1 - 2020 U6 - https://doi.org/10.14279/depositonce-9991 SP - 850 EP - 853 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Wilczek, Tobias A1 - Steffens, Jochen A1 - Weinzierl, Stefan T1 - Zum Einfluss der Akustik auf die Qualität von Restaurants. Eine Feldstudie T2 - Fortschritte der Akustik - DAGA 2020: 46. Deutsche Jahrestagung für Akustik Y1 - 2020 UR - https://depositonce.tu-berlin.de/bitstream/11303/11109/4/wilczek_etal_2020.pdf U6 - https://doi.org/10.14279/depositonce-9999 SP - 854 EP - 857 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Luizard, Paul A1 - Steffens, Jochen A1 - Weinzierl, Stefan ED - Lautenbach, Margriet ED - Witew, Ingo B. ED - de Vries, Diemer ED - Hornikx, Maarten T1 - Adaptation of singers to physical and virtual room acoustics T2 - Proceedings of the International Symposium on Room Acoustics (ISRA) 2019, Amsterdam, Netherlands. Y1 - 2019 SN - 978-90-9032895-9 PB - Nederlands Akoestisch Genootschap CY - Heerde ER - TY - JOUR A1 - Steffens, Jochen A1 - Wilczek, Tobias A1 - Weinzierl, Stefan T1 - Junk Food or Haute Cuisine to the Ear? – Investigating the Relationship Between Room Acoustics, Soundscape, Non-Acoustical Factors, and the Perceived Quality of Restaurants JF - Frontiers in Built Environment N2 - Sound and music are well-studied aspects of the quality of experience in restaurants; the role of the room acoustical conditions, their influence on the visitors’ soundscape evaluation and their impact on the overall customer satisfaction in restaurants, however, has received less scientific attention. The present field study therefore investigated whether sound pressure level, reverberation time, and soundscape pleasantness can predict factors associated with overall restaurant quality. In total, 142 persons visiting 12 restaurants in Berlin rated relevant acoustical and non-acoustical factors associated with restaurant quality. Simultaneously, the A-weighted sound pressure level (LA,eq,15) was measured, and the reverberation time in the occupied state (T20,occ) was obtained by measurements performed in the unoccupied room and a subsequent calculation of the occupied condition according to DIN 18041. Results from linear mixed-effects models revealed that both the LA,eq,15 and T20,occ had a significant influence on soundscape pleasantness and eventfulness, whereby the effect of T20,occ was meditated by the LA,eq,15. Also, the LA,eq,15 as well as soundscape pleasantness were significant predictors of overall restaurant quality. A comprehensive structural equation model including both acoustical and non-acoustical factors, however, indicates that the effect of soundscape pleasantness on overall restaurant quality is mediated by the restaurant’s atmosphere. Our results support and extend previous findings which suggest that the acoustical design of restaurants involves a trade-off between comfort and liveliness, depending on the desired character of the place. KW - DOAJ Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-32115 SN - 2297-3362 N1 - The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fbuil.2021.676009/full#supplementary-material; ut:000655121500001 VL - 676009 PB - Frontiers ER - TY - JOUR A1 - Luizard, Paul A1 - Steffens, Jochen A1 - Weinzierl, Stefan T1 - Singing in different rooms: Common or individual adaptation patterns to the acoustic conditions? JF - The Journal of the Acoustical Society of America Y1 - 2020 U6 - https://doi.org/10.1121/10.0000715 N1 - Open Access Veröffentlichung VL - 147 IS - 2 PB - ASA ER - TY - JOUR A1 - Versümer, Siegbert A1 - Blättermann, Patrick A1 - Rosenthal, Fabian A1 - Weinzierl, Stefan T1 - A comparison of methods for modeling soundscape dimensions based on different datasets JF - The Journal of the Acoustical Society of America N2 - Soundscape studies vary considerably in study design, statistical methods, and model fit metrics used. Due to this confounding of data and methods, it is difficult to assess the suitability of statistical modelling techniques used in the literature. Therefore, five different methods and two performance metrics were applied to three existing soundscape datasets to model soundscape Pleasantness and Eventfulness based on seven acoustic and three sociodemographic predictors. Datasets differed in soundscape type (urban outdoor vs indoor), experimental setting (field- vs lab-based), size, and study design (site- vs person-centered). The fixed-effects and mixed-effects methods ranged from linear to nonlinear regression based on advanced machine learning approaches. Results showed that models performed better for Eventfulness than for Pleasantness in most cases, while performance as measured by the out-of-sample R2 was dependent on the total variance of the target, especially in both field studies with imbalanced targets and groups. Nonlinear methods consistently outperformed linear regression, with random forest and extreme gradient boosting performing particularly well, while the performance levels of all nonlinear methods remained comparable. Mixed-effects models provided a more generalized, albeit slightly smaller prediction performance when tested on unknown groups. Finally, this study motivates the use of cross-validation with special splitting for analyzing small imbalanced datasets. KW - Acoustical properties KW - Audiometry KW - Psychological acoustics KW - Acoustic ecology KW - Artificial neural networks KW - Machine learning KW - Urban development KW - Finite-element analysis KW - Regression analysis KW - Statistical analysis KW - Akustische Eigenschaft KW - Audiometrie KW - Psychoakustik KW - Neuronales Netz KW - Maschinelles Lernen KW - Stadtentwicklung KW - Finite-Elemente-Methode KW - Regressionsanalyse KW - Statistische Analyse Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-48849 SN - 1520-8524 VL - 157 IS - 1 SP - 234 EP - 255 PB - AIP Publishing ER - TY - CHAP A1 - Wilczek, Tobias A1 - Steffens, Jochen A1 - Weinzierl, Stefan ED - Lautenbach, Margriet ED - Witew, Ingo B. ED - de Vries, Diemer ED - Hornikx, Maarten T1 - Room acoustics, soundscapes and customer satisfaction in restaurants – a field study T2 - Proceedings of the International Symposium on Room Acoustics (ISRA) 2019, Amsterdam, Netherlands. Y1 - 2019 SN - 978-90-9032895-9 U6 - https://doi.org/10.18154/RWTH-CONV-240148 SP - 854 EP - 857 PB - Nederlands Akoestisch Genootschap CY - Heerde ER - TY - INPR A1 - Beckmann, Felix A1 - Denfeld, Alexander A1 - Koehn, Konrad A1 - Medebach, Ina A1 - Steffens, Jochen A1 - Weinzierl, Stefan T1 - Untersuchung der akustischen Qualität von Restaurants in Berlin und Düsseldorf N2 - Widrige akustische Bedingungen stellen einen der Hauptgründe für Beschwerden in Restaurants dar; insbesondere bei hörbeeinträchtigten Gästen kann eine schlechte Akustik den Besuch im Restaurant negativ beeinflussen oder gar frühzeitig enden lassen. Um Empfehlungen hinsichtlich optimaler Nachhallzeiten sowie beobachtete Zusammenhänge zwischen akustischen und nichtakustischen Faktoren bei Restaurantbesuchen zu überprüfen und im Hinblick auf verschiedene Restaurantkategorien zu erweitern, wurden in der vorliegenden Studie 20 Restaurants in Berlin und NRW mit insgesamt mehr als 600 Gästen untersucht. Hierbei wurden sowohl die Nachhallzeit als auch der Lautstärkepegel sowie die Anzahl der Gäste im Raum über die Zeit erfasst. Mittels elektronischem Fragebogen wurden Soundscape-Parameter, Besuchsmotive sowie die empfundene Sprachverständlichkeit und Restaurantqualität erhoben. Erste Ergebnisse zeigen einen großen Zusammenhang zwischen objektiven akustischen Größen und wahrgenommener akustischer Angenehmheit und Sprachverständlichkeit, welcher je nach Restaurantkategorie variiert. Die Daten zeigen weiterhin, dass sich die akustische Angenehmheit nicht vollständig durch die Sprachverständlichkeit im Restaurant aufklären lässt. Implikationen für das akustische Design von Restaurants im Spannungsfeld zwischen Ruhe und Lebendigkeit werden diskutiert. Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/files/upload/paper/619.pdf SN - 978-3-939296-22-5 SP - 271 EP - 274 ER - TY - CHAP A1 - Steffens, Jochen A1 - Weinzierl, Stefan ED - Astolfi, Arianna ED - Asdrubali, Francesco ED - Shtrepi, Louena T1 - Noise for dinner - Towards a comprehensive statistical model of the acoustical and overall quality of restaurants T2 - Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023, September 11 - 15, 2023,Torino, Italy N2 - Studies on noise in restaurants have shown a multitude of potential negative effects, for example related to mood, overall satisfaction, intended revisit, the ability to communicate and the actual behaviour in the room. In this paper, we investigated the complex interplay between room acoustics, soundscape evaluation, non-acoustical aspects of a restaurant visit and overall restaurant quality. Based on acoustical measurements and reports from 142 persons visiting 12 restaurants in Berlin, we propose a structural equation model including both acoustical and non- acoustical factors and yielding a good overall fit. The model, for instance, suggests that the A-weighted sound level negatively impacts the assessment of overall restaurant quality, while the effect of soundscape pleasantness on overall restaurant quality is mediated by the restaurant’s perceived atmosphere. Moreover, the reverberation time was found to be effective predominantly through its effect on sound strength, which leads patrons to increasingly raise their speech level to ensure intelligibility. These results thus emphasize the need to design actively the restaurant’s acoustical atmosphere beyond pure loudness reduction which involves a specific trade-off between comfort and liveliness, depending on the desired character of the place. KW - European Acoustics Association KW - Raumakustik KW - Restaurant Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-47908 SN - 978-88-88942-67-4 SN - 2221-3767 SP - 3325 EP - 3327 PB - European Acoustics Association CY - Turin, Italy ER - TY - JOUR A1 - Versümer, Siegbert A1 - Steffens, Jochen A1 - Weinzierl, Stefan T1 - Day-to-day loudness assessments of indoor soundscapes: Exploring the impact of loudness indicators, person, and situation JF - The Journal of the Acoustical Society of America N2 - This study investigates loudness perception in real-world contexts using predictors related to the sound, situation, or person. In the study, 105 participants recorded 6594 sound environments in their homes, which were then evaluated based on the Experience Sampling Method. Hierarchical linear regressions using a loudness level based on ISO 532-1 allowed for obtaining the best model fits for predicting perceived loudness and explaining the highest variance. LAeq and LAF5 provided comparable results and may require less computational effort. However, the analysis shows that only one-third of the variance explained by fixed effects was attributable to the loudness level. Sixteen percent stemmed from perceived properties of the soundscape; 1% were attributable to relatively temporally stable, person-related predictors like participants' age; non-auditory situational predictors made no additional contribution. The results thus did not confirm previous findings on loudness perception under laboratory conditions, emphasizing the importance of the situational context. Along with the current paper, a comprehensive dataset, including the assessed person-related, situational, and sound-related measures as well as LAeq time-series and third-octave spectrograms, is provided to enable further research on sound perception, indoor soundscapes, and emotion. KW - Lautwahrnehmung KW - Akustische Eigenschaft KW - Hörschädigung KW - Lautstärke KW - Audiometrie KW - Sonogramm KW - Regressionsanalyse KW - Gauß-Prozess KW - Auditory perception KW - Acoustical properties KW - Hearing impairment KW - Loudness perception KW - Audiometry KW - Acoustic noise control KW - Spectrograms KW - Acoustic ecology KW - Regression analysis KW - Gaussian processes Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46127 SN - 0001-4966 VL - 153 IS - 5 SP - 2956 EP - 2972 PB - Acoustical Society of America (ASA) ER - TY - JOUR A1 - Brinkmann, Fabian A1 - Aspöck, Lukas A1 - Ackermann, David A1 - Opdam, Rob A1 - Vorländer, Michael A1 - Weinzierl, Stefan T1 - A benchmark for room acoustical simulation. Concept and database JF - Applied Acoustics Y1 - 2021 U6 - https://doi.org/10.1016/j.apacoust.2020.107867 SN - 0003-682X VL - 176 PB - Elsevier 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 - CHAP A1 - Rosenkranz, Andreas A1 - Burgmayer, Ralf A1 - Ackermann, David A1 - Hädrich, Markus A1 - Weinzierl, Stefan ED - Schmidt, Gerhard ED - Nolte, Bodo ED - Heute, Ulrich T1 - A Mobile App for Room Acoustical Measurements T2 - Fortschritte der Akustik – DAGA 2017: 43. Jahrestagung für Akustik Y1 - 2017 UR - https://pub.dega-akustik.de/DAGA_2017/data/articles/000442.pdf SN - 978-3-939296-12-6 SP - 235 EP - 237 PB - Kiel CY - Deutsche Gesellschaft für Akustik e.V. ER - TY - GEN A1 - Ackermann, David A1 - Böhm, Christoph A1 - Weinzierl, Stefan T1 - A Database on Musicians’ Movements During Musical Performances N2 - The movements of 20 musicians playing 11 different musical instruments, including all standard orchestral instruments, were captured during solo performances by means of a motion capturing system under concert-like conditions. KW - Musical Acoustics KW - Virtual Acoustc KW - Room Acoustic Y1 - 2018 U6 - https://doi.org/10.14279/depositonce-7469 N1 - DFG, FOR 1557, Simulation and Evaluation of Acoustical Environments (SEACEN) PB - TU Berlin ER - TY - JOUR A1 - Ackermann, David A1 - Böhm, Christoph A1 - Weinzierl, Stefan T1 - On the numerical simulation of natural acoustic sound sources [Meeting Abstract] JF - The Journal of the Acoustical Society of America N2 - A convincing auralization of acoustical scenes does not only require a proper modeling of the sound propagation between source and receiver, but also an appropriate representation of the acoustical source itself. While the properties of electro-acoustic sources can be well represented by advanced loudspeaker formats with high resolution, the complex, time-variant behavior of natural acoustic sources such as speakers, singers or musical instruments is not in any way considered by current techniques for acoustical simulation and auralization. In the talk, we will present measurement results of the sound power and directivity of natural acoustic sound sources and their dependence on pitch and dynamic level, as well as measurements of typical movements of the source during musical performances. We will demonstrate the physical and perceptual relevance of these effects both in the direct field and in room acoustical environments based on a technical and perceptual evaluation, and discuss new approaches to include these effects in numerical simulations. KW - Acoustics KW - Musical instruments KW - Musical performance KW - Sound production technology KW - Computer simulation Y1 - 2017 U6 - https://doi.org/10.1121/1.4989163 SN - 0001-4966 SN - 1520-8524 VL - 141 IS - 5_Supplement SP - 3997 EP - 3997 ER - TY - GEN A1 - Ackermann, David A1 - Domann, Julian A1 - Brinkmann, Fabian A1 - Arend, Johannes M. A1 - Weinzierl, Stefan T1 - Database: Recordings of a Loudspeaker Orchestra with Multi-Channel Microphone Arrays for the Evaluation of Spatial Audio Methods N2 - For a comparative physical and perceptual evaluation of conceptually different binaural rendering techniques, recordings are needed in which all other factors affecting the sound, such as the sound radiation of the sources, the room acoustic environment and the recording position are kept constant. To provide such a recording, the sound field of an 18-channel loudspeaker orchestra fed by anechoic recordings of a chamber orchestra was captured in two rooms with nine different receivers. In addition, impulse responses were recorded for each sound source and receiver. The anechoic audio signals, the full loudspeaker orchestra recordings and all measured impulse responses are available with open access in the SOFA 2.1 (AES69-2022) format. KW - loudspeaker orchestra KW - multi-channel microphone arrays KW - Lautsprecherorchester KW - mikrofonarray Y1 - 2022 UR - https://doi.org/10.17743/jaes.2022.0059 U6 - https://doi.org/10.14279/depositonce-15774.3 PB - TU Berlin CY - Berlin ER - TY - GEN A1 - Ackermann, David A1 - Ilse, Michael A1 - Grigoriev, Dmitry A1 - Lepa, Steffen A1 - Pelzer, Sönke A1 - Vorländer, Michael A1 - Weinzierl, Stefan T1 - A Ground Truth on Room Acoustical Analysis and Perception (GRAP) N2 - A database of 35 virtual room models was created that can serve as a ground truth for the future development of room acoustical parameters beyond ISO 3382-1. Some of the room models are based on existing performance venues, however without yielding a perfect match of measured and simulated acoustical parameters. Others are artificial designs which were made to systematically cover a wide variety of room acoustical properties. Each of the 35 acoustical environments included in the GRAP database consists of three components: (1) the room model which specifies source and receiver positions and the acoustic properties of the surfaces, (2) the simulated monaural and binaural impulse responses, as well as (3) the item and factor scores, based on a listening test using the Room Acoustic Quality Inventory (RAQI). KW - room acoustical analysis KW - virtual acoustic KW - room acoustic simulation Y1 - 2018 U6 - https://doi.org/10.14279/depositonce-7003.4 N1 - DFG, FOR 1557, Simulation and Evaluation of Acoustical Environments (SEACEN) PB - TU Berlin CY - Berlin ER - TY - GEN A1 - Böhm, Christoph A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - A Multi-channel Anechoic Orchestra Recording of Beethoven's Symphony No. 8 op. 93: Audio Recordings and Accompanying Data N2 - This data set contains an excerpt of the anechoic recording of the Symphony No. 8 in F Major, Op. 93 by Ludwig van Beethoven, performed by the "Orchester Wiener Akademie" conducted by Martin Haselböck. It was recorded in the anechoic chamber of the TU Berlin. KW - anechoic audio KW - auralization KW - virtual acoustics Y1 - 2018 UR - https://doi.org/10.17743/jaes.2020.0056 U6 - https://doi.org/10.14279/depositonce-6729.2 N1 - DFG, FOR 1557, Simulation and Evaluation of Acoustical Environments (SEACEN) PB - TU Berlin CY - Berlin ER - TY - GEN A1 - Aspöck, Lukas A1 - Brinkmann, Fabian A1 - Ackermann, David A1 - Weinzierl, Stefan A1 - Vorländer, Michael T1 - BRAS – A Benchmark for Room Acoustical Simulation KW - Room acoustic simulation KW - virtual acoustic Y1 - 2019 UR - https://doi.org/10.1016/j.apacoust.2020.107867 U6 - https://doi.org/10.14279/depositonce-6726.3 PB - TU Berlin CY - Berlin ER - TY - CHAP A1 - Ebert, Julian A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Messung der Richtcharakteristik von Mikrofonen mit hoher Auflösung [Manuscript] T2 - Fortschritte der Akustik – DAS\DAGA 2025 Y1 - 2025 SN - 978-3-939296-23-2 U6 - https://doi.org/10.71568/dasdaga2025.178 SP - 487 EP - 490 PB - Deutsche Gesellschaft für Akustik eV (DEGA) CY - Berlin ER - TY - JOUR A1 - Böhm, Christoph A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - A Multi-Channel Anechoic Orchestra Recording of Beethoven’s Symphony No. 8 op. 93 JF - Journal of the Audio Engineering Society Y1 - 2020 U6 - https://doi.org/10.17743/jaes.2020.0056 VL - 68 IS - 12 SP - 977 EP - 984 PB - Audio-Engineering Society ER - TY - CHAP A1 - Lemke, Mathias A1 - Hölter, Arne A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Bestimmung von Richtcharakteristiken unter Berücksichtigung reflektierender Randbedingungen T2 - Fortschritte der Akustik – DAGA 2024 - 50. Jahrestagung für Akustik, 18.-21. März 2024, Hannover Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/files/upload/paper/67.pdf SN - 978-3-939296-22-5 SP - 648 EP - 650 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - JOUR A1 - Ackermann, David A1 - Domann, J. A1 - Brinkmann, Fabian A1 - Arend, Jan M. A1 - Schneider, Martin A1 - Pörschmann, Christoph A1 - Weinzierl, Stefan T1 - Recordings of a Loudspeaker Orchestra with Multichannel Microphone Arrays for the Evaluation of Spatial Audio Methods JF - Journal of the Audio Engineering Society Y1 - 2023 U6 - https://doi.org/10.17743/jaes.2022.0059 VL - 71 IS - 1/2 SP - 62 EP - 73 PB - Audio Engineering Society ER - TY - CHAP A1 - Lemke, Mathias A1 - Hölter, Arne A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Physikalisch informierte Interpolation von Richtcharakteristiken [Manuskript] T2 - Fortschritte der Akustik – DAGA 2023 - 49. Jahrestagung für Akustik 06. - 09. März 2023, Hamburg Y1 - 2023 UR - https://pub.dega-akustik.de/DAGA_2023/data/articles/000069.pdf SN - 978-3-939296-21-8 SP - 1656 EP - 1659 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - JOUR A1 - Kob, Malte A1 - Ackermann, David A1 - Weinzierl, Stefan A1 - Zotter, Franz T1 - Dynamische Richtwirkung von Musikinstrumenten JF - Akustik Journal Y1 - 2018 UR - https://www.dega-akustik.de/fileadmin/dega-akustik.de/publikationen/akustik-journal/18-03/akustik_journal_2018_03_online_artikel3.pdf SN - 2569-1597 VL - 3 SP - 28 EP - 38 PB - Deutsche Gesellschaft für Akustik e.V. ER - TY - JOUR A1 - Ackermann, David A1 - Fiedler, Felicitas A1 - Brinkmann, Fabian A1 - Schneider, Martin A1 - Weinzierl, Stefan T1 - On the Acoustic Qualities of Dynamic Pseudo-Binaural Recordings JF - Journal of the Audio Engineering Society N2 - The motion-tracked binaural (MTB) technique allows the dynamic, pseudobinaural rendering of spatial sound scenes recorded by a circular array of microphones on a rigid sphere. The system provides a multichannel live audio transmission from which a head-related signal with approximated interaural time and level differences can be derived and played via headphones, head tracking, and a corresponding rendering software. The latter is mainly calculating imperceptible interpolation between channel pairs during head movements. This contribution evaluates the potential of this format for the creation of virtual acoustic envi- ronments. Based on the technical realization of a 16-channel MTB array with omnidirectional diffuse field-corrected electret condenser microphone capsules, the plausibility of 8 and 16-channel recordings was tested against a physical sound source. Furthermore, the sound quality of the pseudobinaural rendering was assessed based on different items of the Spatial Audio Quality Inventory (SAQI) compared to a true dynamic binaural reference. The results show that the overall plausibility of the MTB signal with optimal interpolation is close to the reference. Even if there are small differences with respect to tone color and spatial sound source attributes, the degree of externalization and even the perceived source elevation were, despite the absence of pinna cues, well comparable to the true binaural reference. KW - acoustics KW - pseudobinaural recording KW - motion-tracked binaural KW - MTB KW - microphone KW - sound Y1 - 2020 U6 - https://doi.org/10.17743/jaes.2020.0036 SN - 0004-7554 VL - 68 IS - 6 SP - 418 EP - 427 PB - Audio-Engineering Society ER - TY - CHAP A1 - Grigoriev, Dmitry A1 - Ackermann, David A1 - Pelzer, Sönke A1 - Weinzierl, Stefan T1 - Ein psychologisches Messinstrument für die akustische Wahrnehmung von Räumen für Musik und Sprache: Stimulus-Erzeugung T2 - Fortschritte der Akustik – DAGA 2016: 42. Deutsche Jahrestagung für Akustik, 14.-17. März 2016 in Aachen Y1 - 2016 SN - 978-3-939296-10-2 SP - 309 EP - 312 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Fiebig, André A1 - Ackermann, David A1 - Böhm, Sandra A1 - Chudalla, Michael A1 - Karakantas, Athansios A1 - Oehme, Astrid A1 - Pourpart, Sophie A1 - Schuck, Moritz A1 - Strigari, Fabio A1 - Weinzierl, Stefan T1 - Attribute zur gesamtheitlichen Charakterisierung der Wahrnehmung von Straßenverkehrsgeräuschen T2 - Fortschritte der Akustik – DAGA 2022 - 48. Jahrestagung für Akustik 21.-24. März 2022, Stuttgart und Online Y1 - 2022 SN - 978-3-939296-20-1 U6 - https://doi.org/10.14279/depositonce-15552 SP - 500 EP - 503 PB - Deutsche Gesellschaft für Akustik e.V. 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 - CHAP A1 - Greif, Jakob A1 - Ackermann, David A1 - Kokabi, Omid A1 - Weinzierl, Stefan T1 - Kann man die Form eines Konzertsaales hören? Ein audiovisueller Test in simulierten 3D-Umgebungen [Abstract] T2 - Fortschritte der Akustik – DAGA 2020 - 46. Jahrestagung für Akustik, 16.-19. März 2020, Hannover Y1 - 2020 UR - https://web.archive.org/web/20240707010113/https://pub.dega-akustik.de/DAGA_2020/data/articles/000432.pdf SN - 978-3-939296-17-1 SP - 1153 EP - 1156 PB - Deutsche Gesellschaft für Akustik e.V. ER - TY - CHAP A1 - Böhm, Christoph A1 - Ackermann, David A1 - Weinzierl, Stefan ED - Seeber, Bernhard T1 - Eine mehrkanalige und nachhallfreie Aufnahme von Beethovens 8. Sinfonie T2 - Fortschritte der Akustik – DAGA 2018 - 44. Jahrestagung für Akustik 19.-22. März 2018, München Y1 - 2018 UR - https://doi.org/10.14279/depositonce-8678 SN - 978-3-939296-14-0 U6 - https://doi.org/10.14279/depositonce-8678 SP - 112 EP - 115 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Bögelein, Silke A1 - Brinkmann, Fabian A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Localization Cues of a Spherical Head Model [Abstract] T2 - Fortschritte der Akustik – DAGA 2018 - 44. Jahrestagung für Akustik 19.-22. März 2018, München Y1 - 2018 UR - https://pub.dega-akustik.de/DAGA_2018/data/articles/000459.pdf SN - 978-3-939296-13-3 SP - 347 EP - 350 PB - Deutsche Gesellschaft für Akustik e.V. ER - TY - GEN A1 - Weinzierl, Stefan A1 - Vorländer, Michael A1 - Ackermann, David A1 - Behler, Gottfried A1 - Brinkmann, Fabian A1 - von Coler, Henrik A1 - Detzner, Erik A1 - Krämer, Johannes A1 - Lindau, Alexander A1 - Pollow, Martin A1 - Schulz, Frank A1 - Shabtai, Noam R. T1 - A Database of Anechoic Microphone Array Measurements of Musical Instruments KW - directivities KW - musical instruments KW - spectral audio features Y1 - 2024 U6 - https://doi.org/10.14279/depositonce-19858 N1 - Forschungsgruppe | FOR 1557 - SEACEN VL - Version 3 PB - Technische Universität Berlin, RWTH Aachen University ER - TY - CHAP A1 - Fiedler, Felicitas A1 - Ackermann, David A1 - Brinkmann, Fabian A1 - Schneider, Martin A1 - Weinzierl, Stefan ED - Schmidt, Gerhard ED - Nolte, Bodo ED - Heute, Ulrich T1 - Entwicklung und Evaluation eines Mikrofonarrays für die Aufnahme von räumlichen Schallfeldern nach dem Motion-Tracked Binaural (MTB) Verfahren T2 - Fortschritte der Akustik – DAGA 2017: 43. Jahrestagung für Akustik, 06. - 09. März 2017 in Kiel Y1 - 2017 SN - 978-3-939296-12-6 SP - 1115 EP - 1117 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - CHAP A1 - Aspöck, Lukas A1 - Brinkmann, Fabian A1 - Ackermann, David A1 - Weinzierl, Stefan A1 - Vorländer, Michael ED - Seeber, Bernhard T1 - Eine Datenbank zur Validierung von akustischen Simulationen T2 - Fortschritte der Akustik – DAGA 2018: 44. Jahrestagung für Akustik, 19.-22. März 2018 in München Y1 - 2018 SN - 978-3-939296-13-3 SP - 1337 EP - 1337 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER -