Hearing aid and a method of operating a hearing aid system
First Claim
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1. A hearing aid comprising:
- an H-bridge output stage having four branches wherein each branch has two switches coupled in series, and a branching point that is positioned between the two switches and that is connected to a terminal of a hearing aid receiver either directly or through a resistor,whereinthe branching point of a first and a second branch are connected directly to respectively a first and a second terminal of the hearing aid receiver,the branching point of a third branch is connected to the branching point of the first branch through a first measurement resistor, andthe branching point of a fourth branch is connected to the branching point of the second branch through a second measurement resistor.
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Abstract
A hearing aid (200), adapted for detection of congestion of a sound output. The invention also relates to a method of detection of congestion of a sound output.
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Citations
11 Claims
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1. A hearing aid comprising:
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an H-bridge output stage having four branches wherein each branch has two switches coupled in series, and a branching point that is positioned between the two switches and that is connected to a terminal of a hearing aid receiver either directly or through a resistor, wherein the branching point of a first and a second branch are connected directly to respectively a first and a second terminal of the hearing aid receiver, the branching point of a third branch is connected to the branching point of the first branch through a first measurement resistor, and the branching point of a fourth branch is connected to the branching point of the second branch through a second measurement resistor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a hearing aid system comprising the steps of:
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identifying a hearing aid receiver type, selecting a first measurement resistor from a group comprising at least two measurement resistors, measuring the impedance of a hearing aid receiver for at least one frequency and using the selected first measurement resistor; and determining if a sound output of the hearing aid system is at least partially congested based on the measured hearing aid receiver impedance. - View Dependent Claims (8, 9, 10, 11)
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Specification