Hearing aid and an ear piece for a hearing aid

1. A BTE hearing aid comprising a housing, an ear piece and a custom earplug, the custom earplug being adapted to fit the ear canal of an individual hearing aid user, the ear piece having a connector for connecting with the custom earplug, the connector and the earpiece having means for snap fitting mutual engagement and means for defining the mutual rotational orientation, wherein the custom earplug comprises two stages of locking means and wherein the connector is adapted for selective trimming so to offer selective positions of the connector in the custom earplug.

2. The hearing aid according to claim 1 , wherein the means for defining the mutual rotational orientation comprises a guide.

3. The hearing aid according to claim 2 , wherein the guide is a slit.

4. The hearing aid according to claim 1 , wherein the custom earplug comprises a stop for positioning the earpiece in the custom earplug.

5. The hearing aid according to claim 1 , wherein the custom earplug has an edge and a sound emitting opening, and wherein the sound emitting opening is retracted from the edge.

6. The hearing aid according to claim 5 , wherein the distance between the edge and the sound emitting opening is about 2 mm.

7. A hearing aid according to claim 1 , wherein the earplug is made as a shell of a photo acrylic and the thickness of the shell is about 0.8 mm.

8. The hearing aid according to claim 7 , wherein the shell has a first opening allowing sounds from the surroundings to pass unaided into the shell.

9. The hearing aid according to claim 8 , wherein the shell comprises a second opening allowing sounds from the ear canal into the shell.

10. The hearing aid according to claim 9 , wherein the second opening is formed by an edge on the custom part, and wherein the first opening and the second opening are interconnected in the shell so that they constitute a vent.

11. The hearing aid according to claim 9 , wherein second opening has a diameter between 0.5 mm and 4.0 mm.

12. The hearing aid according to claim 7 , wherein the shell further comprises a tapered part connected with the custom part.

13. A hearing aid according to claim 1 , wherein said locking means of said earplug comprises at least one earmold engagement surface and said connector includes a plurality of connector engagement surfaces with at least one being removable by said trimming.

14. An ear piece for a BTE hearing aid, the ear piece comprising a connector for connecting with a custom earplug, the connector and the earpiece having means for snap fitting engagement and means for defining the mutual rotational orientation, wherein the custom earplug has two stages of locking means and wherein the connector is adapted for selective trimming so to offer selective positions of the connector in the custom earplug.