Wooden constructions are becoming more and more present in the global building market. They are built very quickly, combining structural and thermal performance in a single layering. They are industrially produced and then assembled on site to minimize building yard problems and increase construction speed. In this scenario, acoustics is often not addressed or is delegated to additional layers that are often inserted without a studied ratio. Many studies have been carried out to predict the acoustic behaviour of walls and floors using numerical or empirical methods. Recently, by means of validation with in situ measurements, the acoustic behaviour of raw wooden partitions has been defined with empirical or semi-empirical laws. In this work, a new method for the determination of the floor noise of raw CLT floors comes through the use of numerical simulation with transfer matrices. Then, the results are compared to the available empirical forecasting models and real measurements.