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On the Influence of the Geometry on Radiation Electrodynamic Loudspeakers
The basic conception of loudspeakers remains unchanged for decades. In particular, the shape of the diaphragm is nowadays designed as the association of a spherical cap and a truncated cap. The present work focuses on the influence of the shape of the diaphragm on the sound radiation. A temporal model based on spatial impulse response has been developed to predict the sound radiation of an axisymetric source subjected to an impulse. It is shown that non-planar sources are less subject to off-axis amplitude and phase variations than planar sources. The comparison between convex and concave geometries is also studied. It is shown that transients are more accurately reproduced by convex structures.
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