JAMAL MOHAMAD, Farah Aina; ANITA AHMAD; RUZAIRI ABDUL RAHIM; SALLEHUDDIN IBRAHIM; JULIZA JAMALUDIN; NOORHAZIRAH SUNAR. The Identification of Optimal Frequency for Ultrasonic Transducers in Concrete-Defect Detection using COMSOL® Simulator. ELEKTRIKA- Journal of Electrical Engineering, [S. l.], v. 24, n. 2, p. 104–110, 2025. DOI: 10.11113/elektrika.v24n2.589. Disponível em: https://elektrika.utm.my/index.php/ELEKTRIKA_Journal/article/view/589. Acesso em: 5 dec. 2025.