What is the noise level inside the Tu-114's passenger cabin?
Perhaps not "as noisy as" due to at least some insulation that must have been installed, but by all accounts (including those of my acquaintances who flew it), Tu-114 was by far the noisiest airliner.

Wikipedia quotes the noise level in the cabin of around 110 dB. This is the level when one needs to yell to other's ear to be heard - which is about how it was.