Hetkämper, Tim, Kevin Koch, Leander Claes, and Bernd Henning. “Phase-Preserving Methods to Visualise Ultrasonic Fields with Schlieren Imaging.”https://doi.org/10.1515/teme-2022-0112__Tm - Technisches Messen 90, no. 2 (2023): 103–12.https://doi.org/10.1515/teme-2022-0112 .
LibreCat: /record/37543
DOI: 10.1515/teme-2022-0112

Dreiling, Dmitrij, Dominik Itner, Tim Hetkämper, Carolin Birk, Hauke Gravenkamp, and Bernd Henning. “Improved Determination of Viscoelastic Material Parameters Using a Pulse-Echo Measurement Setup.”https://doi.org/10.5162/SMSI2023/P59__In SMSI 2023 Conference, 394–95. SMSI - Sensor and Measurement Science International. Nürnberg: AMA Association For Sensors And Measurement, 2023.https://doi.org/10.5162/SMSI2023/P59 .
LibreCat: /record/45205
DOI: 10.5162/SMSI2023/P59

Hetkämper, Tim, Kevin Koch, Manuel Webersen, and Leander Claes. “Application-Based Learning of Signal Analysis Methods with the Help of a Graphical Open-Source Software.”https://doi.org/10.21427/159K-G445__In SEFI 51th Annual Conference Proceedings - Engineering Education for Sustainability. SEFI, 2023.https://doi.org/10.21427/159K-G445 .
LibreCat: /record/47138
DOI: 10.21427/159K-G445

Hetkämper, Tim, Leander Claes, and Bernd Henning. “Vorzeichenrichtige Tomographische Rekonstruktion von Ultraschallfeldern Mit Hilfe Der Schlierentechnik.”https://doi.org/10.1515/teme-2023-0069__Tm - Technisches Messen 90, no.https://doi.org/10.1515/teme-2023-0069__(2023): 49–54.https://doi.org/10.1515/teme-2023-0069 .
LibreCat: /record/48053
DOI: 10.1515/teme-2023-0069

Hetkämper, Tim. Visualisierung von Ultraschallfeldern Mittels Schlierentechnik Und Fraktionaler Fouriertransformation. Workshop “Messtechnische Anwendungen von Ultraschall”, Drübeck, 2022.
LibreCat: /record/6561

Hetkämper, Tim, Leander Claes, and Bernd Henning. “Schlieren Imaging with Fractional Fourier Transform to Visualise Ultrasonic Fields.” In Sensoren Und Messsysteme - Beiträge Der 21. ITG/GMA-Fachtagung. Berlin, Offenbach: VDE Verlag GmbH, 2022.
LibreCat: /record/31331

Claes, Leander, René Spencer Chatwell, Elmar Baumhögger, Tim Hetkämper, Henning Zeipert, Jadran Vrabec, and Bernd Henning. “Measurement Procedure for Acoustic Absorption and Bulk Viscosity of Liquids.”https://doi.org/10.1016/j.measurement.2021.109919__Measurement, 2021.https://doi.org/10.1016/j.measurement.2021.109919 .
LibreCat: /record/22925
DOI: 10.1016/j.measurement.2021.109919

Hetkämper, Tim, Dmitrij Dreiling, Leander Claes, and Bernd Henning. “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.” In Fortschritte der Akustik - DAGA 2021, 2021.
LibreCat: /record/25880

Hetkämper, Tim, Matthias Krumme, Dmitrij Dreiling, and Leander Claes. “A Modular, Scalable Open-Hardware Platform for Project-Based Laboratory Courses in Electrical Engineering Studies.” In SEFI 48th Annual Conference Proceedings - Engaging Engineering Education, 1309–13. SEFI, 2020.
LibreCat: /record/19502

Claes, Leander, Carolin Steidl, Tim Hetkämper, and Bernd Henning. “Estimation of Acoustic Wave Non-Linearity in Ultrasonic Measurement Systems.”https://doi.org/10.48550/arXiv.2001.05708__ArXiv.Org, 2020.https://doi.org/10.48550/arXiv.2001.05708 .
LibreCat: /record/15489
DOI: 10.48550/arXiv.2001.05708
arXiv: 2001.05708

Hetkämper, Tim, Leander Claes, and Bernd Henning. “Evolutionary Algorithm for the Design of Passive Electric Matching Networks for Ultrasonic Transducers.”https://doi.org/10.1121/2.0001110__In 2019 International Congress on Ultrasonics, 2019.https://doi.org/10.1121/2.0001110 .
LibreCat: /record/16076
DOI: 10.1121/2.0001110