Nur’hasanah, I. A., Ramadhan, H. N., Amalia, Y. E., Koharu, K., & Suwandi, G. R. F. (2026). RESONANCE AND FREQUENCY CHARACTERISTICS OF VOWELS: A COMPARATIVE ACOUSTIC STUDY OF SUNDANESE AND NON-SUNDANESE SPEAKERS. JOURNAL ONLINE OF PHYSICS, 11(2), 1–8. https://doi.org/10.22437/jop.v11i2.50631