Transducer comprising moisture transporting element
A hearing aid or a transducer for use in a hearing aid, having a housing with an opening from an inner chamber thereof to surroundings thereof. A moisture transporting element is positioned in the opening. The moisture transporting element may be capillary channels or a thread made of fibers which may fan out at the outer side in order to increase evaporation. The chamber may be hydrophobic and surroundings of the opening be hydrophilic to encourage humidity to travel toward the humidity transporting element to be removed from the chamber.
1. A transducer comprising a housing having: a wall portion defining an outer surface and an inner surface, the inner surface defining at least part of a first chamber, the wall portion comprising an opening from the inner surface to the outer surface, a diaphragm having a first surface defining at least a part of the first chamber, a humidity or moisture transporting element positioned in the opening in the wall portion and arranged to remove from the chamber humidity or moisture present inside the chamber.
2. A transducer according to claim 1 , wherein the moisture transporting element comprises one or more capillary channels.
3. A transducer according to claim 1 , wherein the humidity or moisture transporting element comprises a fibre.
4. A transducer according to claim 1 , wherein the humidity or moisture transporting element comprises a hydrophilic element.
5. A transducer according to claim 1 , wherein the humidity or moisture transporting element comprises a hydrophobic element.
6. A transducer according to claim 1 , wherein the humidity or moisture transporting element comprises an outer part positioned at or outside the outer surface.
7. A transducer according to claim 6 , wherein the outer part comprises a water absorbing element.
8. A transducer according to claim 6 , wherein the outer part comprises a hydrophilic element.
9. A transducer according to claim 6 , wherein the outer part has a shape that, compared to a cross section of the opening, fans out in a direction away from the housing.
10. A transducer according to claim 6 , wherein the outer part is covered by a breathable element.
11. A transducer according to claim 1 , wherein a predetermined area of the inner surface at or around the opening is hydrophilic and where other parts of the inner surface are hydrophobic.
12. A hearing aid comprising a transducer according to claim 1 and a hearing aid housing, the hearing aid housing having:
a first surface and
a second surface opposite to the first surface,
a hearing aid opening configured to be directed into the ear canal of a user, the hearing aid opening being positioned in the first surface,
where the opening is positioned in or at the second surface.
13. A hearing aid according to claim 12 , wherein the housing is configured to have a predetermined direction in relation to the ear canal of the user, and wherein the transducer is positioned within the hearing aid housing so that the opening, in the first chamber, is positioned in or at a lower surface of the first chamber.
14. A hearing aid according to claim 13 , wherein the humidity or moisture transporting element extends from the transducer opening to a hearing aid opening.
15. A hearing aid comprising a housing having: a wall portion defining an outer surface and an inner surface, the inner surface defining at least part of a first chamber, the wall portion comprising an opening from the inner surface to the outer surface, a diaphragm having a first surface defining at least a part of the first chamber, a humidity or moisture transporting element positioned in the opening in the wall portion and arranged to remove from the first chamber humidity or moisture present inside the first chamber.
16. A hearing aid according to claim 15 , wherein the housing is configured to have a predetermined direction in relation to the ear canal of the user, and wherein the transducer is positioned within the hearing aid housing so that the opening, in the first chamber, is positioned in or at a lower surface of the first chamber.
17. A method of operating a transducer according to claim 1 , the method comprising receiving humid air in the first chamber, condensing water from the air, bringing the condensed water into contact with the humidity or moisture transporting element, the humidity or moisture transporting element transporting at least part of the water to the outside of the housing.