In this chapter we mathematically describe how sound propagates through the ocean. This
is the study of sound in a fluid waveguide, ie, a fluid with bounding walls, the surface and …

In the vicinity of a caustic the intensity is very different from that calculated on the basis of
geometrical acoustics. Using the basic formulation of coherence theory we show here how …

We use the two‐scale expansion developed previously to determine the intensity variation in
the neighborhood of caustics, to show how we may calculate the scattering of acoustic …

In this paper we consider the equations governing the second‐and fourth‐order coherence
functions in random media. We first treat radiation propagating in a homogeneous and …

We review the subject of sound propagation through the random ocean internal wave field.
Among the assumptions that are usually made, two are identified as not always valid: the …

The parabolic moment equations can be used to describe wave propagation in a
waveguide, with an arbitrary refractive index profile, that contains weakly scattering …

Using a three-scale expansion, we solved the equation governing the propagation of the
coherence function in a random medium with a mean index of refraction profile. An …

Using previously developed two‐scale solutions [S. Frankenthal et al., J. Acoust. Soc. Am. 7
1, 1124–1130 (1982); BJ Uscinski, Proc. R. Soc. London Ser. A 3 8 0, 137–169 (1982); C …

The behavior of a three‐dimensional, nonrelativistic, quantum mechanical harmonic
oscillator is investigated under the influence of three distinct types of randomly fluctuating …

When a high-frequency electromagnetic wave propagates in a complicated scattering
environment, the contribution at the observer is usually composed of a number of field …