Panel-form loudspeaker

Details Panel-form loudspeaker Panel-form loudspeaker

1997-11-25

2000-05-02

Isen, Forester W.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Driven diverse static structure

381423, 381431, 181148, 181167, H04R 2500

Patent

active

060581964

ABSTRACT:
A panel-form loudspeaker has a resonant multi-mode radiator panel which is excited at frequencies above the fundamental frequency and the coincidence frequency of the panel to provide high radiation efficiency through multi-modal motions within the panel, in contrast to the pistonic motions required of conventional loudspeakers. The radiator panel is a skinned composite with a honeycomb or similar core and must be such that it has a ratio of bending stiffness to the third power of panel mass per unit area (in mks units) of at least 10 and preferably at least 100. An aluminum skinned, aluminum honeycomb cored composite can meet this more severe criterion easily.

REFERENCES:
patent: 3187116 (1965-06-01), Sears et al.
patent: 3247925 (1966-04-01), Warnaka
patent: 3347335 (1967-10-01), Watters et al.
patent: 4198550 (1980-04-01), Matsuda et al.
patent: 4272653 (1981-06-01), Osato et al.
patent: 4385210 (1983-05-01), Marquiss

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