Diaphragm for full range boxless rotary loudspeaker driver

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic

Reexamination Certificate

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Details

C381S431000

Reexamination Certificate

active

07860265

ABSTRACT:
The design of a diaphragm for a rotary loudspeaker driver that eliminates phase cancellation and therefore eliminates the necessity of a box to acoustically isolate the front sound from the back. The key element of the design of the diaphragm is to use a cross section of at least three equal sides. This allows for the long sides of the diaphragm to create essentially positive pressure only as it rotates and creates a very rigid structure. Further by sizing the cross section to the width of the highest frequency to be produced you allow for a nearly perfect 360 degree radiation at all frequencies.

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patent: 2007/0165886 (2007-07-01), Topliss et al.
patent: 2008/0247595 (2008-10-01), Henry

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