Planar diaphragm loudspeaker with counteractive weights

Details Planar diaphragm loudspeaker with counteractive weights Planar diaphragm loudspeaker with counteractive weights

1995-04-21

1997-03-25

Tran, Sinh

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381202, 181173, H04R 2500, H04R 700

Patent

active

056152752

ABSTRACT:
A planar-type loudspeaker incorporating a substantially planar diaphragm constructed from a pre-expanded cellular plastic material, such as polystyrene, in which one or more balancing weights are embedded in a resilient material within recesses formed in the rear surface of the diaphragm. The resilient material enables the weights a degree of movement relative to the diaphragm, such that the weights can serve a counteractive function to help control the frequency response characteristic of the diaphragm.

REFERENCES:
patent: 3722617 (1973-03-01), Bertagni
patent: 4003449 (1977-01-01), Bertagni
patent: 4013846 (1977-03-01), Krawczak et al.

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