In many acoustic systems the aperture dimensions of the projecting and receiving transducers are comparable. The variation of received signal level with separation distance along the acoustic axis in the transition region between near‐ and farfields has been studied by several workers, but apparently little has been published on the directivity patterns for this case. This paper presents the results of an experimental investigation of the directivity patterns for a series of projector‐hydrophone pairs of various ratios of apertures as a function of range from the nearfield to the farfield.