Loudspeaker and a method for producing the same

Details Loudspeaker and a method for producing the same Loudspeaker and a method for producing the same

1995-03-29

1999-02-23

Loomis, Paul

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

181167, 181169, 162228, H04R 2500

Patent

active

058752536

ABSTRACT:
Water-proofed natural pulp or organic synthetic fibers are with polyester-type fibers having a low melting point, and subjected to a paper fabrication process. The fabricated product is dried with hot air at a temperature higher than the melting point of the polyester-type fibers, thereby melt-bonding only intersections of the fibers without completely fusing the polyester-type fibers. The pressure of the hot air contributes to the formation of a predetermined shape. Thus, a water-proof diaphragm for a loudspeaker, having a large thickness, a low density, a high internal loss and a high stiffness, is obtained. By incorporating the thus formed diaphragm, a high-performance loudspeaker having a low distortion and a broad reproducing range is obtained.

REFERENCES:
patent: 3946832 (1976-03-01), Takano et al.
patent: 4071111 (1978-01-01), Croup
patent: 4582163 (1986-04-01), Catthoor
patent: 4828907 (1989-05-01), Hayashi
patent: 5283027 (1994-02-01), Sakamoto et al.
patent: 5329072 (1994-07-01), Kageyama et al.
patent: 5458958 (1995-10-01), Kanzaki et al.

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