Speaker diaphragm

Details Speaker diaphragm Speaker diaphragm

1990-10-31

1993-08-31

Gellner, Michael L.

Acoustics

Diaphragm

Critically defined material or coating

181170, G10K 1300

Patent

active

052411400

ABSTRACT:
A speaker diaphragm has a laminated construction in which a core layer is made of a porous diamond type wafer or wafers and sandwiched by a pair of surface layers made of diamond type material. Presence of numerous small pores in the core layer reduces the specific gravity of the entire diaphragm, thereby increasing efficiency in acoustic conversion. The porous construction of the core layer reduces internal loss of the diaphragm, and suppresses resonance in the treble range.

REFERENCES:
patent: 4772513 (1988-09-01), Sakamoto et al.
patent: 4935303 (1990-06-01), Ikoma et al.
patent: 5031720 (1991-07-01), Ohta et al.

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