Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1987-08-11
1989-06-06
Caldwell, Sr., John W.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381158, 381186, 381188, 381194, 181146, 181157, 181165, H04R 124, H04R 712
Patent
active
048378399
ABSTRACT:
A speaker transducer assembly is disclosed which includes first and second speaker diaphragms supported on a frame in over and under juxtaposition. Each of the speaker diaphragms has a central opening defining an inner periphery which is attached to a voice coil form for coaxial movement therewith and in unison. An intermediate baffle is coaxially positioned between the speaker diaphragms to define upper and lower, separately vented chambers. The upper chamber is vented through an outlet in the region of the outer peripheries of the first speaker diaphragm and the intermediate baffle; similarly, the lower chamber is vented through an outlet situated in the region of the outer peripheries of the second speaker diaphragm and the intermediate baffle. Preferably, the two vent systems have different vent exhaust areas to obtain stagger tuning and thus achieve a split of the deepest frequency load. A supplementary speaker subsystem for handling the higher frequencies is positioned centrally above the upper speaker diaphragm. An aperture is provided through the magnet system for accommodating the speaker leads to the supplementary speaker subsystem. An outwardly flared upper baffle may be positioned between the first speaker diaphragm and the supplementary speaker subsystem to shield its lower face from the sound pressure waves generated by the first speaker diaphragm.
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AVM Hess, Inc.
Caldwell Sr. John W.
Cates Charles E.
Harrer Richard G.
Phillips James H.
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