Title:
ELECTRODYNAMIC BENDING MOMENT DRIVER
Document Type and Number:
WIPO Patent Application WO2002043434
Kind Code:
A3
Abstract:
A bending moment driver, suitable for the boundary operation of planar diaphragm loudspeakers, comprises an oscillatory coil wound along the boundary edge surface of the resonator plate and a permanent magnet system arranged at a small separation from the boundary edge surface of the resonator plate. In an alternative embodiment the driver has a pole core with a fixed coil wound around the above and a permanent magnet let into the plate and fixed to the resonator plate for moment transmission, whereby the pole core is arranged around the edge of the resonator plate in a jaw-like manner. An opposing force pair parallel to the normal of the plate is thus generated, exerting a bending moment on the resonator plate by means of a lever arm corresponding to the length of the permanent magnet.
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Inventors:
BACHMANN WOLFGANG (DE)
KRUMP GERHARD (DE)
REGL HANS-JUERGEN (DE)
ZIGANKI ANDREAS (DE)
KRUMP GERHARD (DE)
REGL HANS-JUERGEN (DE)
ZIGANKI ANDREAS (DE)
Application Number:
PCT/EP2001/011183
Publication Date:
March 06, 2003
Filing Date:
September 26, 2001
Export Citation:
Assignee:
HARMAN BECKER AUTOMOTIVE SYS (DE)
BACHMANN WOLFGANG (DE)
KRUMP GERHARD (DE)
REGL HANS-JUERGEN (DE)
ZIGANKI ANDREAS (DE)
BACHMANN WOLFGANG (DE)
KRUMP GERHARD (DE)
REGL HANS-JUERGEN (DE)
ZIGANKI ANDREAS (DE)
International Classes:
H04R11/02; H04R17/00; H04R7/04; (IPC1-7): H04R7/04; H04R9/06
Domestic Patent References:
| WO2000013464A1 | 2000-03-09 | |||
| WO1999052324A1 | 1999-10-14 | |||
| WO2002043435A2 | 2002-05-30 |
Foreign References:
| DE19825866A1 | 1999-12-16 |
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