The difficulties that existing models have in predicting coherent pressure levels for broadband computations is discussed, and an alternative technique is suggested. It is assumed that the acoustic field has a raylike representation that can be determined at a few fundamental frequencies. An interpolation algorithm provides additional coherent levels. Unlike other methods, multipath interference does not degrade accuracy since the interpolation is performed on individual eigenrays, rather than on the total pressure. Two examples illustrate this procedure. First, the autocorrelation of a received signal is determined by taking the inverse Fourier transform of the power spectrum density. Then, a frequency‐time display simulates the received signal of a passing noise source.