Abstract: Acoustic scattering from the submerged fluid-filled finite cylindrical shell insonified by an incident plane wave is studied experimentally and theoretically.A broadband transducer with the sharp directivity is used as both the transmitter and the receiver in the experiment.The broadband LFM signal and the single-frequency narrow pulse are used to measure the backscattering field of the cylindrical shell.The measured results have a good agreement with the theory’s both in time and frequency domain.The theoretical and experimental results show that the resonances of several additional waves which are caused by the internal fluid are presented in the frequency domain.And a series of‘whispering gallery’ waves produced by the waves reflect back and forth in the internal fluid of the cylindrical shell are added.The reason for the clustering of bowl shaped resonance curves in the frequency-angle spectrum is explained as the superposition of several‘whispering gallery’ waves.