It is commonly said that holograms have a high redundancy, i.e., any part of the hologram contains information about the entire image. This is not true in long-wavelength acoustical holography in which the number of fringes across the recording aperture is commonly less than 50. This is clearly seen when the hologram and image of a simulated acoustic dipole are examined. No matter how close together the positive and negative poles are, the image shows two sources a wavelength apart. However, using only half of the hologram at a time and making use of the phase information in the computer-generated wavefront reconstruction, the two sources can be imaged one at a time in their proper locations and their phases can be determined. Holographic images of simulated acoustic radiation from a one-dimensional bending wave in a semi-infinite plate show radiation from the entire plate when vibrating above its coincidence frequency but only from the ends of the plate when vibrating below its coincidence frequency. [Work supported by NAVSEA.]