Loudspeaker drive unit
AssigneePioneer Electronics Technology, Inc.
InventorAndrew Jones
Life of this patent
Estimating the term…
Abstract
The present invention relates to a compound loudspeaker. In the loudspeaker, the L.F. drive unit has a curved flexible diaphragm whose shape is determined such that it optimally controls the directivity of the compound loudspeaker to produce matched directivity of the L.F. and H.F. drive units. The L.F. diaphragm drive unit radiates sound by the controlled flexure of its diaphragm and thus, eliminates the need for a flexible rolling seal at the edge of the diaphragm. This allows for a continuous smooth surface to exist between the H.F. drive unit and the exterior of the loudspeaker, thereby greatly improving its radiation characteristics.
Claims19
A loudspeaker drive unit, comprising:
- a low frequency drive unit having a low frequency diaphragm for generally radiating sound in a forward direction;
- a high frequency drive unit having a high frequency diaphragm disposed concentrically with said low frequency diaphragm;
- and
- a horn disposed between said low frequency diaphragm and said high frequency drive unit,
- wherein an outer surface of said low frequency diaphragm extends from an inner circumference of said low frequency diaphragm to a forward-most point of said low frequency diaphragm in a smooth and continuous manner,
- wherein said low frequency diaphragm is fixed at an outer circumference of said low frequency diaphragm and said forward-most point is located on said outer surface between said inner circumference of said low frequency diaphragm and said outer circumference of said low frequency diaphragm, and
- wherein said outer circumference does not move when said low frequency diaphragm is radiating sound.
A loudspeaker drive unit, comprising:
- a low frequency drive unit having a low frequency diaphragm for generally radiating sound in a forward direction;
- a high frequency drive unit having a high frequency diaphragm disposed concentrically with said low frequency diaphragm and disposed behind an apex of said low frequency diaphragm;
- and
- a horn that is disposed between said low frequency diaphragm and said high frequency drive unit and that substantially matches said high frequency drive unit with said low frequency diaphragm,
- wherein an outer surface of said low frequency diaphragm extends from an inner circumference of said low frequency diaphragm to a forward-most point of said low frequency diaphragm in a smooth and continuous manner,
- wherein said low frequency diaphragm is fixed at an outer circumference of said low frequency diaphragm and said forward-most point is located on said outer surface between said inner circumference of said low frequency diaphragm and said outer circumference of said low frequency diaphragm, and
- wherein said outer circumference does not move when said low frequency diaphragm is radiating sound.
Dependencies are inferred from the claim text.