Shielded speaker

Details Shielded speaker Shielded speaker

1994-01-31

1995-04-11

Wintercorn, Richard A.

Acoustics

Diaphragm

Critically defined material or coating

181168, G10K 1300, H04R 700

Patent

active

054060389

ABSTRACT:
Briefly, according to the invention, there is provided a shielded speaker. The speaker (10) has a diaphragm (18) coated with a metal layer (28). The coated diaphragm prevents the transmission of unwanted electromagnetic or radio frequency radiation from the front side (22) of the speaker to the rear side (24) of the speaker. In an alternate embodiment of the invention, a shielded electronic device is provided. The device consists of a housing (40) that has an opening (42) for a speaker (10) and a shielding means (44) contained within the housing. The speaker has a diaphragm coated with a metal layer. Disposed within the housing is an electronic device that is susceptible to or emits electromagnetic radiation. The electronic device (46) is coupled to the speaker and the speaker is mounted in the housing such that the metal layer is electrically coupled (48) to the shielding means. The diaphragm with the coated metal layer effectively covers the speaker opening to prevent transmission of spurious electromagnetic or radio frequency radiation through the speaker opening. In the preferred embodiment of the invention, the metal layer is a sputtered coating and is applied to one side of the diaphragm.

REFERENCES:
patent: 3938618 (1976-02-01), Ambruoso, Sr.
patent: 4081631 (1978-03-01), Feder
patent: 4112168 (1978-09-01), Schafft
patent: 4470479 (1984-09-01), Inoue et al.
patent: 4713277 (1987-12-01), Akiyama et al.
patent: 4847981 (1989-07-01), Suzuki et al.

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