SITI FAZRIA TOBUTO; DEWA GEDE EKA SETIAWAN; LUKMAN SAMATOWA. The Influence of the Problem-Based Learning Model with a Differentiated Approach on Senior High School Students’ Problem-Solving Ability in the Concept of Sound Waves. International Journal of Health, Economics, and Social Sciences (IJHESS), v. 7, n. 4, p. 1848~1853, 15 Oct. 2025.