Studio is a specifically room designed for playing music either vocal, instruments or both. One consideration factor in studio is the ability of vertical boundaries to insulate incoming airborne noise from or to outside the object. Boundaries performance is rated with single number represented by Weighted Standardized Level Difference (DnTw). Since noise characteristic may be different in all frequency, it needs some correction at low frequency hence the rating has to adjusted to D_nT_w+C_(tr). Recommendation value for studio music is larger than 50 dB. The volume of research research is around 49 m3 with cubical shape. Based on in-situ evaluation, each insulation rating for each boundary are not larger than 50 dB hence it needs to be redesigned. The solution is taken from mathematical simulation by changing composition of materials, dimension of air gap and thickness of material.
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