Microphone battery barrier
A hearing device comprising a battery compartment including a metal-air battery and a microphone assembly arranged nearby or coupled to the battery compartment, the battery compartment and/or the microphone assembly in protected using an elastic polymer membrane.
1. A hearing device, comprising:
a metal-air battery;
a battery vent associated with the metal-air battery;
a microphone;
a sound inlet associated with the microphone; and
a gas diffusion membrane formed from an oxygen permeable polymer located lateral of and spaced apart from the battery vent and the sound inlet such that a volume is defined between the membrane, at one end of the volume, and the battery vent and sound inlet, at the other end of the volume.
2. The hearing device claimed in claim 1 , wherein
the gas diffusion membrane separates the battery vent and the sound inlet from the surroundings of the hearing device.
3. The hearing device claimed in claim 1 , wherein
the gas diffusion membrane comprises an elastic oxygen permeable polymer membrane.
4. The hearing device claimed in claim 3 , wherein
the elastic oxygen permeable polymer membrane comprises a silicone rubber membrane.
5. The hearing device claimed in claim 4 , wherein
the silicone rubber membrane defines a thickness selected from the group consisting of less than 60 μm, less than 40 μm, and less than 20 μm.
6. The hearing device claimed in claim 4 , wherein
the silicone rubber comprises dimethyl silicone rubber.
7. The hearing device claimed in claim 1 , wherein
the gas diffusion membrane defines a thickness selected from the group consisting of less than 60 μm, less than 40 μm, and less than 20 μm.
8. The hearing device claimed in claim 7 , wherein
the gas diffusion membrane is either a compression molded silicon rubber membrane or an injection molded silicon rubber membrane.
9. The hearing device claimed in claim 1 , wherein
the gas diffusion membrane defines a diameter of 2-5 mm.
10. The hearing device claimed in claim 1 , wherein
the gas diffusion membrane defines an elliptic shape.
11. The hearing device claimed in claim 1 , further comprising:
a tube that extends laterally of the gas diffusion membrane.
12. The hearing device claimed in claim 1 , wherein
the hearing device comprises an in-the-ear hearing device.