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Автор: Mason W.P. Thurston R.N.
Издательство: Academic Press
Год издания: 1973
isbn: 0-12-477910-7
Количество страниц: 415
Язык: english
Формат: DJVU
Размер: 22 Мб
Каталожный номер: 61333
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As in other recent volumes, the several themes treated here are not directly related to each other, except for their common bond to physical acoustics.
The theme of the first two chapters is surface waves in acoustics and observation of the related acoustic radiation from plane and curved surfaces. The first chapter surveys the essential results obtained concerning acoustic surface waves on curved surfaces and relates them to the corresponding plane surface waves. Starting with a classification of surface and lateral waves on flat surfaces and a description of their properties, the chapter proceeds to discuss surface waves generated by sound scattering on curved surfaces. More general excitation mechanisms are mentioned briefly. The second chapter describes a group of acoustic wave problems that are particularly suitable for study by means of schlieren visualization. Previously regarded mainly as a teaching demonstration technique, schlieren visualization in acoustics is shown to be a significant scientific tool, since stroboscopic schlieren observation determines the positions of whole acoustic wave fronts emanating from surfaces that involve complicated phenomena not easily probed by usual acoustic measurement techniques. Seventy-three figures add greatly to the value of this chapter.
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