Microphone device with an orientation sensor and corresponding method for operating the microphone device
View Patent ↗A directional microphone for a hearing device should be easy for the user to operate. To this end it is equipped with an orientation sensor, such that it can be controlled as a function of orientation. It is for example possible in this manner to switch it to directional operation, when it is aligned horizontally. When it is aligned vertically, the directional microphone is for example switched automatically to omni-directional operation.
1. A microphone device for a hearing aid, comprising:
at least two microphones arranged on a single structure in a straight line for enabling a directional effect of the microphone device; and
a control device permanently connected to the single structure, wherein the control device selects an operation mode of the microphones, wherein the operation mode comprises an omni-directional operation mode and a directional operation mode, the control device comprising an orientation sensor functionally and mechanically connected to the microphones, the orientation sensor configured to:
detect an orientation of a current absolute main pick-up direction; and
generate an orientation signal based on the detected orientation,
wherein the control device selects the operation mode of the microphones at least partially based on the orientation signal.
2. The microphone device according to claim 1 , wherein the control device is configured to switch off the microphones if the orientation signal indicates that a current absolute main pick-up direction has an essentially vertically downward orientation.
3. The microphone device according to claim 2 , wherein the control device is further configured to switch the microphones into the directional operation mode having the directional effect if the orientation signal indicates that a current absolute main pick-up direction has an essentially horizontal orientation.
4. The microphone device according to claim 2 , wherein the control device is further configured to switch the microphones into the omni-directional operation mode having the directional effect if the orientation signal indicates that a current absolute main pick-up direction has an essentially vertically upward orientation.
5. The microphone device according to claim 1 , wherein the microphone device is an external component relative to the hearing aid.
6. The microphone device according to claim 5 , further comprising a wireless transmission interface for wirelessly transmitting microphone signals to the hearing aid.
7. A method of operating a microphone device for a hearing aid, comprising:
assigning a directional mode of operation to a first orientation and an omni-directional mode of operation to a second orientation;
aligning a main pick-up direction of a line of microphones arranged on the microphone device according with a selected orientation;
determining the main pick-up direction using an orientation sensor fixed to the microphone device;
determining which orientation the main pick-up direction essentially matches;
selecting an operation mode of the microphone device using a control device fixed to the microphone device based on the mode of operation assigned to the matched orientation.
8. The method according to claim 7 , further comprising switching off the microphone device if the main pick-up direction has an essentially vertically downward orientation.
9. The method according to claim 8 , further comprising switching the microphone device into a directional operation mode having the directional effect if the main pick-up direction has an essentially horizontal orientation.
10. The method according to claim 8 , further comprising switching the microphone device into an omni-directional operation mode having the omni-directional effect if the main pick-up direction has an essentially vertically upward orientation.
11. The microphone device according to claim 3 , wherein the control device is further configured to vary a directional effect as a function of an inclination of the current absolute main pick-up direction in relation to the horizontal orientation when in the directional operation mode.
12. The method according to claim 9 , comprising varying the directional effect as a function of an inclination of the main pick-up direction in relation to the horizontal orientation when in the directional operation mode.