In this paper, an analysis model is proposed to predict the propeller singing, which generally occurs when the vortex shedding frequencies at the blade trailing edge and some natural frequencies of the blade are nearly equal. A set of vibration and acoustic data taken during a sea trial of a bulk carrier was used to demonstrate this phenomenon. Numerical analyses, using finite element and boundary element methods, were performed to calculate the natural frequencies, mode shapes, and the radiation efficiency of the propeller blade. Together with a theoretical model describing the interaction of vortex shedding and blade vibration for predicting the response of the blade due to vortex excitation, the possible mode associating with singing can be deduced. In comparison with measured data, good agreement is shown between the frequency of the predicted mode that show both high response level and high radiation efficiency and the measured singing frequency.