Abstract
The theoretical image curves of the Fresnel diffraction patterns caused by superposed ultrasonic waves for various sound intensities and for various observing positions are obtained from our theory developed in the previous paper. The curves are compared with the experimental results obtained by using superposed ultrasonic waves(frequencies two megacycles)crossing perpendicular to each other, showing a fair agreement between them. The changes of the visibilities of the images with the observing positions and the intensities of the waves are discussed in detail.
