You can find charts for STC ratings of different configurations of architectural assemblies. Simplistically, but not actually fully true, the STC is theoretically the number of dB that can be reduced by the assembly. Officially, the sound frequency has significant impact on transmission and lower frequencies won’t cut as much as higher frequencies.
Without an acoustic engineer to do some detailed calculations, let’s assume the basics. The weakest point of a fully sealed and well insulated standard dwelling is generally the glazing. Dual glazing provides approximately high 20s STC. In reality, sound will transmit around operable windows, door jambs, wall penetrations etc so expecting high 20s STC from a dwelling is unlikely.
To achieve an STC 80 out of drywall/framing/insulation you need a 10” thick wall consisting of two layers each side of Quietrock 545 and R30 insulation (8” thick). At over $100 per sheet, the cost and weight of the panels would be prohibitive. Then there’s the issue of leak at panel joints.
Finally, you’d need it air tight with an air tight sealable entrance. Which may be good or bad, depending on what’s inside generating the 110db. Perhaps the lack of oxygen is just the type of torture you’re after, or at least a side benefit.
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