Khairiyah, Aisyah Nurul, Gandi Sugandi, and Deddy Kurniadi. “Design and Characterization of Ultrasonic Langevin Transducer 20 KHz Using a Stepped Horn Front-Mass”. Journal of Engineering and Technological Sciences 55, no. 4 (October 26, 2023): 357-372. Accessed October 8, 2025. https://journals.itb.ac.id/index.php/jets/article/view/19680.