Methods and apparatuses for setting a hearing aid to an omnidirectional microphone mode or a directional microphone mode
First Claim
1. A method of automatic switching between a first microphone mode and a second microphone mode in a binaural hearing aid, the binaural hearing aid comprising a first microphone system for provision of a first input signal, and a second microphone system for provision of a second input signal, where the first microphone system is configured for use by a first ear of a user, and the second microphone system is configured for use by a second ear of the user, the method comprising:
- obtaining modulations of the first input signal and the second input signal, wherein the act of obtaining the modulations of the first input signal and the second input signal is performed with at least the first microphone system being in the first microphone mode;
evaluating the modulations of the first input signal and the second input signal to determine a first evaluation index of speech intelligibility for the first input signal, and a second evaluation index of speech intelligibility for the second input signal; and
setting one or both of the first microphone system and the second microphone system based on a result from the act of evaluating;
wherein the act of setting comprises setting one of the first microphone system and the second microphone system to the second microphone mode, and setting the other one of the first microphone system and the second microphone system to the first microphone mode, based on the result from the act of evaluating the modulations of the first and second input signals, the second microphone mode being different from the first microphone mode.
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Accused Products
Abstract
A method of automatic switching between omnidirectional (OMNI) and directional (DIR) microphone modes in a binaural hearing aid comprising a first microphone system, a second microphone system, where the first microphone system is adapted to be placed in or at a first ear of a user, the second microphone system is adapted to be placed in or at a second ear of said user, the method includes a measurement step, where the spectral and temporal modulations of first and second input signals are monitored, an evaluation step, where the spectral and temporal modulations of the first and second input signal are evaluated by the calculation of an evaluation index of speech intelligibility for each of said signals, and an operational step, where the microphone mode of the first and the second microphone systems of the binaural hearing aid are selected in dependence of the calculated evaluation indexes.
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Citations
28 Claims
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1. A method of automatic switching between a first microphone mode and a second microphone mode in a binaural hearing aid, the binaural hearing aid comprising a first microphone system for provision of a first input signal, and a second microphone system for provision of a second input signal, where the first microphone system is configured for use by a first ear of a user, and the second microphone system is configured for use by a second ear of the user, the method comprising:
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obtaining modulations of the first input signal and the second input signal, wherein the act of obtaining the modulations of the first input signal and the second input signal is performed with at least the first microphone system being in the first microphone mode; evaluating the modulations of the first input signal and the second input signal to determine a first evaluation index of speech intelligibility for the first input signal, and a second evaluation index of speech intelligibility for the second input signal; and setting one or both of the first microphone system and the second microphone system based on a result from the act of evaluating; wherein the act of setting comprises setting one of the first microphone system and the second microphone system to the second microphone mode, and setting the other one of the first microphone system and the second microphone system to the first microphone mode, based on the result from the act of evaluating the modulations of the first and second input signals, the second microphone mode being different from the first microphone mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A binaural hearing aid comprising:
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at least one signal processor; a first microphone system for provision of a first input signal; a second microphone system for provision of a second input signal, where the first microphone system is adapted to be placed in or at a first ear of a user, and the second microphone system is adapted to be placed in or at a second ear of the user; wherein the at least one signal processor is configured for; obtaining modulations of the first input signal and the second input signal with at least the first microphone system being in a first microphone mode; evaluating the modulations of the first input signal and the second input signal to determine a first evaluation index of speech intelligibility for the first input signal, and a second evaluation index of speech intelligibility for the second input signal; and setting one or both of the first microphone system and the second microphone system based on a result from the act of evaluating; wherein the at least one signal processor is configured for setting one of the first microphone system and the second microphone system to a second microphone mode, and setting the other one of the first microphone system and the second microphone system to the first microphone mode, based on the result from the act of evaluating the modulations of the first and second input signals, the second microphone mode being different from the first microphone mode. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification