Audio Speaker Surround Geometry For Improved Pistonic Motion
AssigneeApple Inc.
InventorsPablo Seoane Vieites, Christopher Wilk, Suzanne Hardy, Alexander V. Salvatti, Oliver Leonhardt, Scott P. Porter
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Abstract
An audio speaker having a suspension system including a surround to support a diaphragm within a frame and to reduce non-pistonic motion of the diaphragm at several resonant frequencies is disclosed. More particularly, embodiments of the surround include a film that undulates in a peripheral direction around the diaphragm and includes several undulations above and below a radial gap between the diaphragm and the frame. Other embodiments are also described and claimed.
Claims20
A speaker surround, comprising:
- a film having an inner edge separated from an outer edge along a radial plane, the film including a film surface undulating in a peripheral direction between the inner edge and the outer edge, wherein the film surface includes a plurality of upper undulations above the radial plane and a plurality of lower undulations below the radial plane, wherein the undulations include respective surface boundaries defined by the inner edge, the outer edge, and respective pairs of radial line segments extending along the radial plane from the inner edge to the outer edge, and wherein the undulations include respective smooth surface curvatures extending across the respective surface boundaries.
A speaker surround, comprising:
- a film having an inner edge separated from an outer edge along a radial plane, an intermediate line extending in a peripheral direction along the radial plane between the inner edge and the outer edge, the film undulating along the intermediate line, wherein the film includes a repeating surround segment having a surface boundary defined by the inner edge, the outer edge, and a pair of radial line segments extending from the inner edge to the outer edge and intersecting the intermediate line, and wherein the repeating surround segment includes one or more of an upper undulation above the radial plane or a lower undulation below the radial plane, the upper undulation and the lower undulation having respective smooth surface curvatures extending across the surface boundary.
An audio speaker, comprising:
- a frame having an inner rim;
- a diaphragm along a central axis, the diaphragm having an outer rim separated from the inner rim by a radial gap around the outer rim;
- and
- a surround having a film undulating in a peripheral direction along the radial gap, the film including a plurality of surround segments, each surround segment having a respective surface boundary defined by an inner edge attached to the outer rim, an outer edge attached to the inner rim, and a respective pair of radial line segments extending from the inner edge to the outer edge, wherein each surround segment includes one or more upper undulation above the radial gap or lower undulation below the radial gap, the undulations having respective smooth surface curvatures extending across the respective surface boundary.
Dependencies are inferred from the claim text.