The architect or acoustics consultant calculates total ceiling area and decides whether Option 1 (all ceiling material to have an NRC of 0.70) or Option 2 (a combination of ceiling, wall and floor material has a combined NRC of 0.70 for an area the same s

The architect or acoustics consultant calculates total ceiling area and decides whether Option 1 (all ceiling material to have an NRC of 0.70) or Option 2 (a combination of ceiling, wall and floor material has a combined NRC of 0.70 for an area the same size as the ceiling area) is best for the project. Option 1 is the most straightforward but might not be possible for all projects due to design constraints such as, ceiling material selection, classroom layout and programmatic issues. Research other design strategies and compliant products.