Speaker apparatus

Details Speaker apparatus Speaker apparatus

2006-08-08

2006-08-08

Ni, Suhan (Department: 2646)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S398000

Reexamination Certificate

active

07088842

ABSTRACT:
It is an object of the invention to provide an improved speaker apparatus which maintains the advantages as an inverted dome speaker and has a good directivity and a thin thickness, as well as a broad playback frequency band extending from a high frequency band to a low frequency band. The speaker apparatus includes a dome diaphragm carrying a voice coil and having a concave cross section protruding towards the voice coil, an edge provided on the outer periphery of the dome diaphragm, having a concave cross section protruding towards the voice coil, and supporting the dome diaphragm on a frame, and a magnetic circuit forming a magnetic gap containing the voice coil. Particularly, the edge has a broad edge width {b=(1.5−3)a} bearing a lower playback frequency band than a playback frequency band born by the dome diaphragm.

REFERENCES:
patent: 2974204 (1961-03-01), Supitilov
patent: 6490363 (2002-12-01), Liu
patent: 6636612 (2003-10-01), North et al.
patent: 54-1242 (1974-12-01), None
patent: 11-088987 (1990-03-01), None

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