Transient nonlinear acoustical holography

This paper presents our recent work on transient nonlinear acoustical holography. A higher order stepping algorithm is first introduced, which is shown to be significantly more accurate and efficient than the original one (Evaluation of a wave-vector-frequency-domain method for nonlinear wave propagation, Jing et al., J. Acoust. Soc. Am. 129, 32) through systematic numerical study. Underwater experimental results from a highly focused transducer will be presented here to show the validity of the model. Both linear and nonlinear, forward and backward projection of the acoustic field are conducted. While linear acoustical holography is shown to produce erroneous results, good agreement is found between our nonlinear model and the experiment.