With a thicker interior door such as a solid core interior door stc ratings of 35 are standard.
Stc rated solid core wood doors.
Soundproof doors are available 1 3 4 thick from stc 33 to stc 50.
Ever wonder what the stc ratings of doors means and why it s important.
Soundproof doors are available at greater thicknesses from stc 51 to stc 56.
Doors and frames have been tested as a assembly and are supplied with acoustic perimeter and bottom seals.
For example 1 8 clearances around the edges reduce the effective rating of an stc 52 door to stc 21.
Stc doors over 8 0 tall and all stc 45 and higher may have longer lead times factory installed glazing is required to ensure acoustic value pairs tested as standard swing only used in double egress will affect acoustic rating and or void fire label.
Any unsealed gaps and clearances in door assemblies effectively cancel out the noise reduction benefits of stc rated doors.
Generally a less soundproof door such as a hollow core door is given 20 for an stc rating which means that most conversation level speech will still be heard when the door is closed.