<![CDATA[Classroom loudness is common in middle childhood, yet its educational meaning remains contested because classroom talk may support participation while excessive noise may disrupt concentration. This study examines how developmental social orientations among children aged 10–12 manifest as classroom loudness and how such loudness shapes learning processes. Using a reflective qualitative design, the study conducts a single-case narrative-theoretical analysis based on a student author’s lived classroom experience, reflective notes, and interpretation through Vygotsky’s sociocultural theory and Piaget’s constructivist theory. The findings show that classroom loudness emerges from peer-oriented participation, verbal expressiveness, and collaborative activity; that classroom sound has a dual character as both engagement and distraction; that its effects depend on learning activity; and that excessive noise reduces focused listening and reflective thinking. Based on these findings, this article proposes the ZPD-ZQR framework as a conceptual model for balancing guided social interaction within the Zone of Proximal Development and structured quiet reflection within the Zone of Quiet Reflection. Because the study is based on a single reflective case, its contribution lies primarily in interpretive and conceptual insight rather than broad empirical generalization.]]>
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