Hetkämper T, Koch K, Claes L, Henning B. Phase-preserving methods to visualise ultrasonic fields with schlieren imaging. tm - Technisches Messen. 2023;90(2):103-112. doi:10.1515/teme-2022-0112
LibreCat: /record/37543
DOI: 10.1515/teme-2022-0112

Dreiling D, Itner D, Hetkämper T, Birk C, Gravenkamp H, Henning B. Improved determination of viscoelastic material parameters using a pulse-echo measurement setup. In: SMSI 2023 Conference. SMSI - Sensor and Measurement Science International. AMA Association For Sensors And Measurement; 2023:394-395. doi:10.5162/SMSI2023/P59
LibreCat: /record/45205
DOI: 10.5162/SMSI2023/P59

Hetkämper T, Koch K, Webersen M, Claes L. Application-based learning of signal analysis methods with the help of a graphical open-source software. In: SEFI 51th Annual Conference Proceedings - Engineering Education for Sustainability. SEFI; 2023. doi:10.21427/159K-G445
LibreCat: /record/47138
DOI: 10.21427/159K-G445

Hetkämper T, Claes L, Henning B. Vorzeichenrichtige tomographische Rekonstruktion von Ultraschallfeldern mit Hilfe der Schlierentechnik. tm - Technisches Messen. 2023;90():49-54. doi:10.1515/teme-2023-0069
LibreCat: /record/48053
DOI: 10.1515/teme-2023-0069

Hetkämper T. Visualisierung von Ultraschallfeldern Mittels Schlierentechnik Und Fraktionaler Fouriertransformation.; 2022.
LibreCat: /record/6561

Hetkämper T, Claes L, Henning B. Schlieren imaging with fractional Fourier transform to visualise ultrasonic fields. In: Sensoren Und Messsysteme - Beiträge Der 21. ITG/GMA-Fachtagung. VDE Verlag GmbH; 2022.
LibreCat: /record/31331

Claes L, Chatwell RS, Baumhögger E, et al. Measurement procedure for acoustic absorption and bulk viscosity of liquids. Measurement. Published online 2021. doi:10.1016/j.measurement.2021.109919
LibreCat: /record/22925
DOI: 10.1016/j.measurement.2021.109919

Hetkämper T, Dreiling D, Claes L, Henning B. Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik. In: Fortschritte der Akustik - DAGA 2021. ; 2021.
LibreCat: /record/25880

Hetkämper T, Krumme M, Dreiling D, Claes L. A modular, scalable open-hardware platform for project-based laboratory courses in electrical engineering studies. In: SEFI 48th Annual Conference Proceedings - Engaging Engineering Education. SEFI; 2020:1309-1313.
LibreCat: /record/19502

Claes L, Steidl C, Hetkämper T, Henning B. Estimation of acoustic wave non-linearity in ultrasonic measurement systems. arXiv.org. Published online 2020. doi:10.48550/arXiv.2001.05708
LibreCat: /record/15489
DOI: 10.48550/arXiv.2001.05708
arXiv: 2001.05708

Hetkämper T, Claes L, Henning B. Evolutionary algorithm for the design of passive electric matching networks for ultrasonic transducers. In: 2019 International Congress on Ultrasonics. ; 2019. doi:10.1121/2.0001110
LibreCat: /record/16076
DOI: 10.1121/2.0001110