Suspension of a receiver of a hearing device
The disclosure relates to a hearing device, e.g., a hearing aid, wherein open-cell foam is compressed between a receiver and a second section, e.g., receiver chamber, of the hearing device, a method for providing such hearing device, and a method for identifying a desired property of such open-cell foam of such hearing device. The hearing device comprises a first section comprising the open-cell foam being compressed, such that the open-cell foam has at least a strain value of a first point of an elastic modulus-strain curve of the open-cell foam and at most the strain value of a third point of the elastic modulus-strain curve, and such that the receiver is connected to the second section via the first section.
1. A hearing device comprising:
a receiver;
a first section; and
a second section;
wherein the first section comprises an open-cell foam with an elastic modulus-strain curve, the elastic modulus-strain curve having a first point, a second point, and a third point, wherein the second point is defined by a global minimum of the elastic modulus-strain curve, wherein the first point is defined by a knee point before the second point, wherein the third point is located after the second point, and wherein the third point has an elastic modulus value being equal to an elastic modulus value of the first point;
wherein the receiver is connected to the second section via the first section, and wherein the open-cell foam is compressed between the receiver and the second section; and
wherein the open-cell foam, as compressed between the receiver and the second section, has at least a strain value of the first point and at most a strain value of the third point.
2. The hearing device according to claim 1 , wherein the open-cell foam is strained to at least a strain value of the second point.
3. The hearing device according to claim 1 , wherein the open-cell foam is strained to at most two times a strain value of the second point.
4. The hearing device according to claim 1 , wherein the receiver has a resonance frequency that is a function of a strain of the open-cell foam.
5. The hearing device according to claim 4 , wherein the resonance frequency that is the function of the strain defines a resonance frequency-strain curve that has a primary point defined by a knee point, the knee point of the resonance frequency-strain curve being before a secondary point defined by a global minimum of the resonance frequency-strain curve.
6. The hearing device according to claim 5 , wherein the open-cell foam is compressed between the receiver and the second section such that the open-cell foam is strained to at least a strain value of the primary point.
7. The hearing device according to claim 1 , wherein the open-cell foam is strained to a compression of at least 10% between the receiver and the second section.
8. The hearing device according to claim 1 , wherein the open-cell foam is strained to a compression of at most 35% between the receiver and the second section.
9. The hearing device according to claim 1 , wherein the open-cell foam comprises polyurethane.
10. The hearing device according to claim 1 , wherein the second section comprises a first part of a housing section of the hearing device.
11. The hearing device according to claim 1 , wherein the receiver is encircled by the open-cell foam, and wherein the open-cell foam is abutting the receiver and the second section.
12. The hearing device according to claim 1 , wherein the open-cell foam as compressed between the receiver and the second section has a thickness within 0.3-1.5 mm.
13. The hearing device according to claim 1 , further comprising a sound tube, wherein the receiver has a front end, a rear end opposite to the front end, and a sidewall between the front end and the rear end, wherein the front end of the receiver is connected to the sound tube of the hearing device, and wherein the open-cell foam is compressed between the second section and the sidewall of the receiver.
14. The hearing device according to claim 1 , wherein the hearing device is a hearing aid.
15. A method for providing a hearing device comprising a receiver, a first section, and a second section, wherein the first section comprises an open-cell foam with an elastic modulus-strain curve, the elastic modulus-strain curve having a first point, a second point, and a third point, wherein the second point is defined by a global minimum of the elastic modulus-strain curve, wherein the first point is defined by a knee point before the second point, wherein the third point is located after the second point, and wherein the third point has an elastic modulus value being equal to an elastic modulus value of the first point, the method comprising:
providing the open-cell foam; and
compressing the open-cell foam between the receiver and the second section, such that the open-cell foam has at least a strain value of the first point and at most a strain value of the third point.
16. The method according to claim 15 , further comprising adhering the open-cell foam to the receiver.
17. The method according to claim 16 , wherein the act of compressing comprises inserting the receiver with the adhered open-cell foam into a receiver chamber of the second section to compress the open-cell foam between the receiver and the second section.