All rooms are soundproofed by varying methods, including but not limited to, double-layer 5/8" sheetrock with the seams offset from layer to layer on both sides of the wall that is filled with foam, batten insulation, a double wall, which is an insulated wall built next to another insulated wall with an air gap in-between, by adding foam to the interior walls and corners, also known as ‘’bass traps’’, and by using two panes of 1/2" or thicker glass on 5–15-degree angles reflecting the sound downward towards a carpet or other sound catching medium along with an air gap of 1" minimum on the smaller side of the V shape created by the two panes. This is just a basic starting point for a home studio and a studio designer would be a wise choice to hire. Using Table 3.1 Surface densities of common building materials and using the formula TL = 14.5 log Mf–16 can be used to calculate the transmission loss of various frequencies through materials.