Abstract
Aspects of the radiation of magnetoacoustic waves by an oscillating plane piston and by a radially pulsating cylinder and sphere are discussed. Expressions are derived for the magnetohydrodynamic perturbation fields in the medium. The radiation reaction forces acting on the given bodies are determined. The significant distinction between the theory of socalled “magnetic” sound generation and the theory of ordinary sound radiation is demonstrated. For example, the directivity pattern of a magnetic radially pulsating cylinder or sphere has a dipole character, whereas for ordinary sound generated by the same sources the pattern is isotropic, i.e., monopolar.
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