Method for operating a hearing device, hearing device and binaural hearing device system
A method for operating a hearing device includes generating first and second input signals from a sound signal by using respective first and second input transducers, providing a first angle and an angular range and, with respect to frequency bands, based on the first and second input signals and first angle, forming an attenuation directional signal having relative attenuation at least for a second angle in the angular range about the first angle and thereby setting and an overlay parameter. A gain directional signal is formed based on the first and second input signals and the overlay parameter and/or second angle, having relative gain for the second angle. An angled directional signal is generated from the attenuation directional signal and the gain directional signal. An output signal is generated based on the angled directional signal. A hearing device and a binaural hearing device system are also provided.
1. A method for operating a hearing device, the method comprising the following steps:
using a first input transducer to generate a first input signal from a sound signal;
using a second input transducer to generate a second input signal from the sound signal;
providing a first angle and an angular range; and
with respect to frequency bands:
forming an attenuation directional signal based on the first input signal, the second input signal and the first angle, the attenuation directional signal having a relative attenuation at least for a second angle in the angular range about the first angle for setting an overlay parameter, and forming the attenuation directional signal from a first directional signal and a second directional signal as intermediate signals based on the first input signal and second input signal by minimizing a signal level over the angular range around the first angle in order to form the attenuation directional signal,
forming a gain directional signal based on the first input signal and the second input signal as well as at least one of the overlay parameter or the second angle having a relative gain for the second angle,
generating an angled directional signal from the attenuation directional signal and the gain directional signal, and
generating an output signal based on the angled directional signal.
2. The method according to claim 1 , which further comprises at least one of:
forming the attenuation directional signal from the first directional signal and the second directional signal based on the first angle and the angular range, or
forming the gain directional signal from the first directional signal and the second directional signal based on at least one of the overlay parameter or the second angle.
3. The method according to claim 1 , which further comprises forming a notch filter directional signal as the attenuation directional signal.
4. The method according to claim 1 , which further comprises forming the angled directional signal by overlaying the attenuation directional signal and the gain directional signal.
5. The method according to claim 4 , which further comprises minimizing a signal level to generate the angled directional signal.
6. The method according to claim 1 , which further comprises:
performing a directional noise suppression for generating the output signal; and
specifying the angled directional signal as a useful signal and specifying the attenuation directional signal as an interference signal.
7. The method according to claim 1 , which further comprises adding an omnidirectional signal in a frequency-dependent manner for generating the output signal.
8. A hearing device, comprising:
a first input transducer for generating a first input signal;
a second input transducer for generating a second input signal; and
a signal processing unit and an output transducer for generating an output sound signal from an output signal;
said signal processing unit being adapted to generate the output signal with reference to the first input signal and the second input signal by:
providing a first angle and an angular range; and
with respect to frequency bands:
forming an attenuation directional signal based on the first input signal, the second input signal and the first angle, the attenuation directional signal having a relative attenuation at least for a second angle in the angular range about the first angle for setting an overlay parameter, and forming the attenuation directional signal from a first directional signal and a second directional signal as intermediate signals based on the first input signal and second input signal by minimizing a signal level over the angular range around the first angle in order to form the attenuation directional signal,
forming a gain directional signal based on the first input signal and the second input signal as well as at least one of the overlay parameter or the second angle having a relative gain for the second angle,
generating an angled directional signal from the attenuation directional signal and the gain directional signal, and
generating an output signal based on the angled directional signal.
9. A binaural hearing device system, comprising two hearing devices according to claim 8 .