Behind the ear hearing aid

Abstract

A hearing aid (1) comprising a behind-the-ear part (2), an in-the-ear part (3) and a connecting part (4) connecting the behind-the-ear part and the in-the-ear part. The in-the-ear part comprises a first end (7) adapted to be aligned in the ear canal in a direction towards the ear drum when in use, and a second end (8) adapted to abutting a part of the ear outside the ear canal when in use. At least one side wall (15, 16) is arranged between said first end (7) and said second end (8). The direction from a centre of the first end to a centre of the second end defines an axis. The connecting part (4) is attached to the side wall and is extending from this side wall in an angle to the axis between 20-70 degrees. The invention also provides a receiver unit for a hearing aid and a method for fitting a hearing aid.

Claims

1. A hearing aid comprising a behind-the-ear part adapted to be arranged behind the ear of a hearing aid user, an in-the-ear part adapted to be arranged at least partially in the ear canal, said in-the-ear part comprising a first end surface in which a sound opening for guiding the sound from the hearing aid in the direction of the ear drum is arranged, and a second end surface, which is the surface situated furthest away from the first end surface, and a connecting part connecting the behind-the-ear part and the in-the-ear part, wherein said first end surface is adapted to be aligned in the ear canal in a direction towards the ear drum when in use, and said second end surface is adapted to abut a part of the ear outside the ear canal when in use, wherein at least one side wall is arranged between said first end surface and said second end surface, and wherein said connecting part is attached to said side wall and has a part that extends from said side wall in an angle of between 20-70 degrees from an axis extending from a center of the first end surface to a center of the second end surface.

2. The hearing aid according to claim 1, wherein said second end surface of said in-the-ear part is adapted to abut the tragus part of the outer ear.

3. The hearing aid according to claim 1, wherein said connecting part is extending from a side wall adapted to be arranged vertically, or substantially vertically, when said hearing aid is arranged on a person standing in an upright position.

4. The hearing aid according to claim 1, wherein said connecting part is adapted to extend parallel or substantially parallel to a surface of the tragus part of the ear when said hearing aid is in use.

5. The hearing aid according to claim 1, wherein said connecting part is adapted for when in use extending from said in-the-ear part in a direction away from or substantially away from the ear canal.

6. The hearing aid according to claim 1, adapted to be arranged at the ear without the use of an anchor.

7. The hearing aid according to claim 1, adapted to be arranged at the ear without any supporting elements in the concha part of the ear other than said second end surface abutting a part of the ear outside the ear canal and said connecting part.

8. The hearing aid according to claim 1, wherein a receiver is arranged in said in-the-ear part, and wherein said connecting part comprises an electrical wire connecting said receiver with said behind-the-ear part.

9. The hearing aid according to claim 1, wherein said connecting part extends from said side wall in an angle between 30 and 60 degrees.

10. The hearing aid according to claim 1, wherein said connecting part extends from said side wall in an angle between 40 and 50 degrees.

11. The hearing aid according to claim 8, wherein said receiver is provided with an extension part at said second end surface, said extension part being adapted to abut said part of the ear outside the ear canal when in use.

12. The hearing aid according to claim 1, wherein said connecting part is extending from said side wall adjacent said second end surface.

13. A receiver unit for a hearing aid, said receiver unit comprising a first end adapted to be aligned in the ear canal in a direction towards the ear drum when in use, a second end adapted to abut a part of the ear outside the ear canal when in use, and at least one side wall arranged between said first end and said second end, wherein an electrical wire is attached to said side wall and extends from said side wall in an angle of between 20 and 70 degrees to an axis extending from a center of the first end to a center of the second end.

14. The receiver according to claim 13, wherein said electrical wire extends from said side wall in an angle between 30 and 60 degrees.

15. The receiver according to claim 13, wherein said second end of said receiver part is adapted to abut the tragus part of the outer ear.

16. A method for fitting a hearing aid a hearing aid comprising a behind-the-ear part adapted to be arranged behind the ear of a hearing aid user, an in-the-ear part adapted to be arranged at least partially in the ear canal, said in-the-ear part comprising a first end surface in which a sound opening for guiding the sound from the hearing aid in the direction of the ear drum is arranged, and a second end surface, which is the surface situated furthest away from the first end surface, and a connecting part connecting the behind-the-ear part and the in-the-ear part, wherein said first end surface is adapted to be aligned in the ear canal in a direction towards the ear drum when in use, and said second end surface is adapted to abut a part of the ear outside the ear canal when in use, wherein at least one side wall is arranged between said first end surface and said second end surface, and wherein said connecting part is attached to said side wall and has a part that extends from said side wall in an angle of between 20-70 degrees from an axis extending from a center of the first end surface to a center of the second end surface, comprising the steps of arranging the behind-the-ear part behind an ear of said person, shaping a connecting part connecting said behind-the-ear part to an in-the-ear part, such that said connecting part fits the outer ear of said person, and arranging said in-the-ear part at the entrance of the ear canal such that said in-the-ear part abuts the tragus part of the outer ear.

17. The hearing aid according to claim 1, wherein said sidewall is an exterior side wall of said in-the-ear part.

18. The receiver unit according to claim 13, wherein said sidewall is an exterior side wall of said receiver unit.

19. The method according to claim 16, wherein said sidewall is an exterior side wall of said in-the-ear part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates a hearing aid with a behind-the-ear part, an in-the-ear part and a connection.

(2) FIG. 2 illustrates a receiver arranged at the ear canal entrance.

(3) FIG. 3 illustrates a receiver in a receiver housing and with an electrical cable.

(4) FIG. 4 illustrates a receiver provided with an extension piece arranged at the ear canal entrance.

(5) FIG. 5 illustrates a part of an in-the-canal part connected through a sound tube to a behind-the-ear part.

(6) FIG. 6 illustrates a horizontal cross sectional view through both ear canals, and showing the position of in-the-ear parts of the hearing aids.

(7) FIG. 7 illustrates a hearing aid intended for the left ear of a person.

DETAILED DESCRIPTION OF THE INVENTION

(8) FIG. 1 shows a hearing aid 1 with a behind-the-ear part 2 and an in-the-ear part 3. The in-the-ear part 3 is here illustrated as a receiver 5 provided with an instant fit ear plug 6. It could also have been a custom fit ear mold. Sound from the receiver will pass through an opening 9 in the first end 7 of the in-the-ear part 3. The second end 8 of the in-the-ear part 3 is preferably smooth or substantially smooth without protrusions or indentations. Preferably there are also no sharp edges in the transition from the end 8 to the side walls 15, 16.

(9) The connecting part 4 connecting the behind-the-ear part 2 and the in-the-ear part 3 will comprise electrical cables when the in-the-ear part 3 comprises a receiver 5. In case the receiver was arranged in the behind-the-ear part 2 the connecting part 4 would be a sound tube. In both cases the connecting part may be detachably attached or fixedly attached to the in-the-ear part 3. In case the in-the-ear part comprises a receiver and the connector comprises an electrical cable, a fixed attachment, e.g. by soldering the wires passing through the cable directly to the receiver, is often preferred, since this will take up less space than having a connection through a detachable connector or plug. In this case the cable would preferably be connected through a connector or plug to the behind-the-ear part in order to facilitate combining different types of receivers to the same behind-the-ear part in an easy way, and to facilitate easy replacement of a receiver.

(10) FIG. 2 shows an example of an in-the-ear part 3 arranged at the entrance of the ear canal 10. A receiver 5 with an instant fit ear plug 6 is illustrated here. It is seen that the end 8 of the receiver housing opposite the direction to the ear canal is abutting slightly against a part of the outer ear 11. This part of the outer ear is often called the tragus 11. The end 8 of the in-the-ear part would typically abut against the part of tragus 11 facing the ear canal opening. This abutment helps keep the receiver in the correct position without any lateral migration, e.g. during chewing, talking, sports or sleeping. This position can be held without the use of an anchor or other supporting means.

(11) FIG. 2 further shows the connecting part 4 in the form of an electrical cable attached to the receiver 5, and extending from the receiver in an angle between 20-70 degrees, preferably 30-60 degrees and more preferably 40-50 degrees, to an axis passing through, or substantially through, the center part of the two ends of the in-the-ear part 3. These two ends are here a first end 7 of the receiver 5 facing the ear canal and a second end 8 pointing away from the ear canal and partly abutting the tragus portion 11 of the outer ear.

(12) The angle in the specified range between the cable and the receiver will assist in holding the receiver in the position where the second end portion 8 abuts the tragus part 11 of the outer ear. This is because such an angle will keep the connecting part 4, e.g. a cable or a tube close to the surface of the outer ear in a more natural way. The section of the cable or tube, close to the in-the-ear part preferably extends more or less parallel with the tragus surface against which the end portion abuts. The angle will facilitate guiding the cable or tube towards the area of the outer ear between the tragus and the crus of helix. For most human ears there will be an indent or a small divide between the tragus and the crus of helix. By application of the angle , it has been found to be relatively easy to guide the cable or tube through this indent or divide while keeping it close to the skin. This will offer a very stable positioning of the hearing aid with a reduced visibility of the cable or tube.

(13) The connecting part meets the in-the-ear part at an angle . The part obeying this angle will extend for a distance of at least 3 mm, preferably at least 5 mm, more preferably at least 8 mm of the connecting part, before this is bent in any way. The circle 18 at the endpoint of the connecting part 4 in FIG. 2 illustrates that the connecting part here is bending out of the paper plane. If the purpose is to achieve the same advantages of abutment against the tragus part, the invention also covers an embodiment where the connecting part is fixed to a side wall of the in-the-ear part in a larger angle (than the 70 degrees), but has been bent permanently into the angle within a very short distance, e.g. 0.5 mm from the side wall.

(14) As seen from FIG. 2 there will be more space for the abutment between the second end of the receiver and the tragus part of the outer ear when the cable is not connected to the receiver through this second end, but through a side wall relatively close to or adjacent to this second end. The number of side walls will be dependent on the shape of the receiver. If the receiver is circular or elliptic seen in a cross sectional view perpendicular to the axis shown in FIG. 2, then there is one side wall extending between the first end 7 and the second end 8. However, indentions and protrusions along the side of the receiver, or the in-the-ear part 3, could in principle create any number of side walls. FIG. 2 shows that the cable extends from a side wall adjacent to the second end 8 of the receiver.

(15) Defining when a wall of the receiver, or of the in-the-ear part, is an end part or is a side wall is relatively simple for the shape of the receiver illustrated in FIG. 2 or 3. If the shape of the end surfaces is more complex, the first end surface may be defined as the surface in which the sound opening for guiding the sound from the hearing aid in the direction of the ear drum is arranged. The second end surface would then be the surface situated furthest away in the opposite direction.

(16) Also when the shape of the in-the-ear part does not follow a rectangular shape, the axis shown in FIG. 2 should pass through the first and the second end. This also holds if the overall shape of the in-the-ear part is curved, e.g. like a banana, or bent. At the middle of the in-the-ear part 3 the axis may therefore pass outside the in-the-ear part.

(17) FIG. 3 shows an example of an in-the-ear part 3 with a part of the connecting part 4 extending from a side wall of the in-the-ear part. A receiver unit 5 is arranged in a receiver housing 20, where the receiver housing comprises a nose part accommodating an ear wax guard 21, for preventing ear wax from entering into the receiver unit 5. The ear wax guard 21 comprises a mesh for blocking. The first end 7 in the example of the in-the-ear part in FIG. 3 is thus equivalent to a flange part of the earwax guard. In this text the term receiver may include the receiver as well as a receiver housing.

(18) FIG. 3 illustrates an axis extending from a center of the first end 7 to a center of the second end 8 of the in-the-ear part. FIG. 3 also illustrates a center axis of the connecting part, and how the angle is defined by these two axes.

(19) FIG. 4 shows the receiver 5 with an instant fit ear plug 6 of FIG. 2 where the receiver is provided with an extension part 17 in order to extend the total length of the in-the-ear part, i.e. increase the distance from the first end 7 to the second end 8. This facilitates arranging in-the-ear parts in ears where the distance between the ear canal and the tragus part might be too large for achieving the abutment against the tragus part.

(20) An extension part for this purpose would preferably be provided with an opening for the connecting part extending from a side wall of the in-the-ear part to pass through. This opening may be in the form of a slit.

(21) FIG. 5 shows a hearing aid 1 with a behind-the-ear part 2 and the connector part 19 of an in-the-ear part 3. The connector part 19 is connected to the behind-the-ear part 2 through a sound tube 4. The connector in this example comprises the second end 8 of the in-the-ear part. The connector 19 comprises an adaptor 23 for connecting to an ear plug or ear mold, thereby forming an in-the-ear part 3. It is seen from FIG. 5 that the sound tube 4 will extend from the connector 19, and thereby from an in-the-ear part, in an angle in the range 20-70 degrees, and that it is attached to and is extending from a side wall of the connector.

(22) FIG. 6 shows a horizontal cross sectional view of a head of a person in upright position. The cross sectional view goes through both ear canals and illustrates the position of in-the-ear parts 3 of hearing aids. The view is seen from above the upright standing person (holding the head in a neutral position, i.e. looking straight ahead). An enlarged view of the right ear with the in the-ear-part 3 is also shown. It is seen how the in-the-ear part is arranged partly in the ear canal and with an end extending out of the ear canal and abutting against the tragus 11. It is seen that the connecting part 4 extends from the in-the-ear part 3 in a direction opposite or substantially opposite the direction towards the ear canal, or it could be described as a direction pointing away from the scull of the person wearing the hearing aid.

(23) It is indicated from FIG. 6 that the connecting part 4 is attached to a side wall prepared for being arranged vertically when the in-the-ear part 3 is arranged in the ear of a person standing in an upright position. The connecting part extends parallel or substantially parallel with the surface of the tragus part facing the ear canal, as the connecting part extends in a direction pointing away from or in the opposite direction of the ear canal.

(24) FIG. 7 shows a hearing aid prepared for being arranged at the left ear of a person. This figure shows how the connecting part 4 extends from a side wall 15 of the in-the-ear part. This side wall is prepared to be arranged vertically or substantially vertical when the hearing aid is arranged at the ear of an upright standing person.