Noise from vehicles, trains, and aeroplanes will be heard at huge distances from the resource. exact predictions of the loudness of the noise require exact computations of sound propagation within the surroundings. This e-book describes types that may be used for those computations. The versions have in mind advanced results of the surroundings and the floor floor on sound waves, together with the results of wind and temperature distributions, atmospheric turbulence, abnormal terrain, and noise limitations.
the most textual content of the ebook specializes in actual results in atmospheric acoustics. the results are illustrated through many numerical examples. The major textual content calls for a really restricted mathematical heritage from the reader; exact mathematical descriptions of the types, constructed from the fundamental ideas of acoustics, are offered in appendices. versions for relocating media are in comparison with versions which are in keeping with the powerful sound velocity method. either two-dimensional versions and three-d types are offered. As meteorological results play a big position in atmospheric acoustics, chosen themes from boundary layer meteorology and the speculation of turbulence also are awarded.

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