The acoustical characteristics of an axisymmetric horn loudspeaker with an elastic diaphragm are calculated by applying the finite element method to both the elastic disphragm and the acoustic cavity of a horn mounted in a rigid infinite baffle. The acoustic reaidation into the semi-infimite space is treated analytically in terms of the velocity potential that is given as the integral of the product of particle velocity and Green`s function. Vibrational behavior of the diaphragm, driving-point impedance, sound-pressure distribution inside the horn, and near-field and far-field acoustic radiation are presented for discussion. The experimental validity of the calculated characteristics is confirmed for the horn loudspeaker in far-field sound-pressure response.
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