Method for capturing a user's voice input in an exterior area of ​​a motor vehicle, as well as motor vehicle

Abstract

Method for capturing a voice input (14) of a user (12) in an exterior area (11) of a motor vehicle (10), wherein a control unit (21) of the motor vehicle (10) sets a microphone selection (39) and / or a directivity for a microphone arrangement (20) of the motor vehicle (10) depending on a directional signal (29) which indicates a relative position (38) of the user (12) with respect to the motor vehicle (10), and the voice input (14) is captured by means of the microphone arrangement (20), characterized by the fact that to determine the direction signal (29) by means of a detection device (24) different from the microphone arrangement (20), the relative position (38) of the user (12) and / or at least one user device (13) carried by the user (12) is recognized on the basis of a signal emanating from the latter, and the recognized relative position (38) is signaled by means of the direction signal (29), - wherein the detection device (24) has an antenna arrangement (30) and the detection device (24) is configured to determine an incident direction (32) from which at least one radio signal (13') of the at least one user device (13) is incident on the antenna arrangement (30) and to determine the direction signal (29) on the basis of the determined incident direction (32) and wherein at least one radio signal (13') is received, a Bluetooth signal and / or a WLAN signal from a respective mobile device and / or a communication signal from a radio key, - and / or wherein the detection device (24) comprises a passive sensor device (34) and the detection device (24) detects a location of the user (12) on the basis of at least one sensor signal (35) from the sensor device (34) and determines the relative position (38) based on the detected location, - and / or wherein the microphone arrangement (20) has several microphones (26) and, during microphone selection (39), a predetermined number of the microphones (26) closest to the user (12) according to the direction signal (29) are selected from the microphones (26) depending on the direction signal (29), and only the selected microphones (26) are used for capturing the speech input (14), - and / or wherein the directionality is generated by means of a beamforming based on several microphones (26) of the microphone arrangement (20) and the beamforming is operated adaptively and a detection minimum (28) of the beamforming is adaptively aligned towards an acoustic disturbance source (18), while a detection maximum (27) is kept spatially fixed by means of the directional signal (29), - and / or wherein, in addition to capturing the speech input (14) by means of a microphone device (20) by means of a further microphone selection and / or a further directivity depending on the directional signal (29), a diffuse noise field (17) is also determined in a detection direction away from the user (12) and the captured speech input (14) is filtered by means of a noise suppression device (36) on the basis of the determined noise field (17).

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