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Usually, the regulations impose noise limits in terms of sound pressure levels. This parameter is effective in order to evaluate comfort in a lot of cases, but sometimes, especially in crowded areas, it is not enough. To calculate the actual comfort within a public space a number of other factors that can be felt by people as subjective and not architecture-dependent may be needed. Only partially this is true because the architecture heavily influences the feelings of rumble, hum, echo etc. This influence can be made explicit through the use of another parameter: the reverberation time. In this order, the acoustic comfort inside public rooms in cruise ships has been investigated through acoustic simulations based on common used techniques of ray tracing. Three different steps of the model calculation accuracy were used to show the effect of different assumptions. The results were then presented in terms of reverberation time and sound pressure level.