The fluidized bed turbulent regime is an intermediate regime between bubbling fluidization and pneumatic transport, which can be characterized by the study of wall pressure fluctuations with time. Our experimental results confirm that the statistical analysis of the signal enables to determine the regime boundaries. An original frequency analysis shows that there is no systematic change in dominant Frequencies in the turbulent fluidization regime. However, an enrichment of frequency spectra occurs. The signal stochastic analysis by Hurst＇s method leads to the same conclusion.