Volume 9, Issue 3, July 2013
Index of content:
9(2013); http://dx.doi.org/10.1121/1.4821141View Description Hide Description
Introducing the reader to some of the recent research regarding jet noise generation and propagation from high‐performance military aircraft and complementary research into noise source characterization and reduction using numerical simulations and laboratory‐scale models.
9(2013); http://dx.doi.org/10.1121/1.4821142View Description Hide Description
Despite reassurances by the developers of wind farms and the industry, there is evidence to support the existence of a health problem under some conditions and for some people with wind turbines, which appears to be tied to the infrasound or low frequency portion of the acoustic emissions of the turbine. It is important for scientists and engineers to acknowledge the problem and to work to eliminate it for affected residents who were the industry's supporters.
9(2013); http://dx.doi.org/10.1121/1.4821143View Description Hide Description
The reason why some may be disturbed by the low levels of noise from wind turbines is clearly complex and requires a multidisciplinary approach. Whilst there are instances of genuine noise problems from wind turbines, the emphasis on infrasound and its supposed effects on health, distracts attention from solving these. Objectors to wind turbines, who promote wind turbine infrasound as a problem, are not helping those whom they wish to support.
9(2013); http://dx.doi.org/10.1121/1.4821144View Description Hide Description
In long range underwater acoustics there is a simple quantity known as the waveguide invariant that tells you how acoustic spatial interference patterns change as you move a distant receiver horizontally away from a sound source. More than just a curiosity, this quantity is beginning to find naval applications