During the past four decades, extensive research has been carried out on different noise
barrier shapes using analytical and physical modelling as well as full scale testing. This …

Machine generated contents note: 1.1 Atmospheric acoustics--1.2 Scope of the book--1.3
Structure of the book--2.1 Introduction--2.2 Plane waves--2.3 Complex notation for harmonic …

The second edition of Predicting Outdoor Sound is an up-to-date reference on the
propagation of sound close to the ground and its prediction. New content includes …

Prediction of sound pressure levels at medium and large distances from road, railway and
industrial sources, has been of considerable interest in environmental acoustics for several …

A numerical model is described which enables the sound field in the region of outdoor noise
barriers to be calculated by using the boundary element method. The non-uniqueness of …

The acoustical effects of hedges result from a combination of physical noise reduction and
their influences on perception. This study investigates the physical noise reduction so as to …

An Eulerian model for sound propagation in an inhomogeneous moving medium is
described. The model is based on numerical solution of the linearized Euler equations of …

We prove unique existence of solution for the impedance (or third) boundary value problem
for the Helmholtz equation in a half‐plane with arbitrary L∞ boundary data. This problem is …

In this paper we consider the impedance boundary value problem for the Helmholtz
equation in a half-plane with piecewise constant boundary data, a problem which models …

Green's functions for acoustic problems is the fundamental solution to the inhomogeneous
Helmholtz equation for a point source, which satisfies specific boundary conditions. It is very …