Mechanical filter for an electrodynamic transducer
AssigneeU.S. Philips Corporation
InventorsAdrianus J. M. Kaizer, Wiert Kopinga
Life of this patent
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Abstract
An electrodynamic transducer having a mechanical filter as a coupling element between a voice coil former (3) and cone (1) in order to obtain a frequency characteristic whose high frequency roll-off begins at a lower frequency, in which a part (7) of the centering diaphragm (4) situated within the periphery of the voice coil former is used as the mechanical filter.
Claims7
An electrodynamic transducer comprising a vibratory cone, a voice coil former on which a voice coil is arranged, and a coupling element between the voice coil former and the cone comprising a centering diaphragm which extends across the voice coil former with the cone secured to a portion of the centering diaphragm which is situated within the periphery of the voice coil former and the portion of the centering diaphragm which constitutes the coupling element between the voice coil former and the cone being operative to function as a mechanical filter.
Dependencies are inferred from the claim text.