Earbud with pivoting acoustic duct

1. An earbud, comprising: an acoustic duct defining a longitudinal passage through the duct; and a driver sub-housing having a first portion and a stem portion extending from the first portion, wherein the stem portion of the driver sub-housing encases at least a portion of the acoustic duct, and wherein the acoustic duct is rigid and wherein the driver sub-housing is pliant to flex when the acoustic duct pivots relative to the first portion of the driver sub-housing.

2. The earbud of claim 1 , the driver sub-housing being bonded to the acoustic duct by a two-shot injection molding process.

3. The earbud of claim 1 , the acoustic duct comprising a T-shaped cross section.

4. The earbud of claim 3 , the acoustic duct comprising a stair-step between a base and a cross member of the T-shaped cross section.

5. The earbud of claim 4 , at least a portion of the base of the T-shaped cross section circumferentially sealed by the driver sub-housing.

6. The earbud of claim 1 , wherein the first portion of the driver sub-housing comprises a footless goblet shape.

7. The earbud of claim 6 , wherein the acoustic duct comprises a T-shaped cross section, and wherein the stem portion of driver sub-housing encases a base portion of the T-shaped cross section.

8. The earbud of claim 6 , further comprising a loudspeaker disposed in a bowl of the footless goblet shape.

9. The earbud of claim 8 , further comprising an outer exterior housing enclosing the bowl to define a rear acoustic volume of the loudspeaker.

10. The earbud of claim 9 , the outer exterior housing comprising a rib extending into the bowl to seat the loudspeaker within the bowl.

11. The earbud of claim 9 , further comprising an inner exterior housing coupled to the outer exterior housing.

12. The earbud of claim 11 , the inner exterior housing defining a conduit for the base of the T-shaped cross section.

13. The earbud of claim 1 , further comprising: an inner exterior housing that defines a conduit that surrounds a least part of the stem portion of the driver sub-housing, the conduit having a diameter greater than the stem portion.

14. The earbud of claim 13 , the conduit defining a stop for the acoustic duct when the acoustic duct pivots relative to the driver sub-housing.

15. An earbud, comprising: a flexible driver sub-housing; a rigid acoustic duct at least partially bonded within a stem portion of the flexible driver sub-housing; a loudspeaker disposed within a bowl of the flexible driver sub-housing; and an exterior housing disposed about the loudspeaker to enclose the loudspeaker within the bowl, wherein the exterior housing defines a conduit that surrounds a least part of the stem portion of the driver sub-housing and that has a diameter greater than the stem portion to permit the rigid acoustic duct to pivot relative to the exterior housing by contorting the flexible driver sub-housing.

16. The earbud of claim 15 , wherein the rigid acoustic duct is manufactured by a first shot of a two-shot injection molding process.

17. The earbud of claim 16 , wherein the flexible driver sub-housing is manufactured by a second shot of the two-shot injection molding process.