Abstract: The present disclosure relates to a motor vehicle external microphone having at least one microphone unit which has a microphone capsule arranged in a microphone housing, wherein the microphone housing has at least one microphone opening, through which an acoustic channel is formed between the at least one microphone opening and the microphone capsule, wherein the motor vehicle external microphone comprises a changeover device, which is designed to open the at least one microphone opening in an activated state of the motor vehicle external microphone and to close the same in a deactivated state of the motor vehicle exterior microphone. The invention also relates to a motor vehicle roof antenna and to a motor vehicle having such a motor vehicle external microphone. Finally, the invention relates to a method for operating such a motor vehicle external microphone.

Abstract: The present disclosure relates to a head unit for an infotainment system of a vehicle. The head unit is coupled to a mobile terminal device via a Bluetooth link. The head unit is configured to exchange a digital audio signal adapted for improved audio quality during the hands-free talking, via an additional wireless link, in response to hands-free talking during a phone call with the mobile terminal device coupled via the Bluetooth link based on a hands-free profile.

Abstract: The present disclosure relates to a head unit for an infotainment system of a vehicle. The head unit is coupled to a mobile terminal device via a Bluetooth link. The head unit is configured to exchange a digital audio signal adapted for improved audio quality during the hands-free talking, via an additional wireless link, in response to hands-free talking during a phone call with the mobile terminal device coupled via the Bluetooth link based on a hands-free profile.

Abstract: The present disclosure relates to a motor vehicle external microphone having at least one microphone unit which has a microphone capsule arranged in a microphone housing, wherein the microphone housing has at least one microphone opening, through which an acoustic channel is formed between the at least one microphone opening and the microphone capsule, wherein the motor vehicle external microphone comprises a changeover device, which is designed to open the at least one microphone opening in an activated state of the motor vehicle external microphone and to close the same in a deactivated state of the motor vehicle exterior microphone. The invention also relates to a motor vehicle roof antenna and to a motor vehicle having such a motor vehicle external microphone. Finally, the invention relates to a method for operating such a motor vehicle external microphone.

Abstract: An embodiment relates to a computing device for determining a signal quality of a communications connection, wherein the computing device is configured to receive a first signal of a test sequence of a first communications device and a second signal of a test sequence of a second communications device connected to the first communications device and comprised in a vehicle, and wherein the computing device is configured to determine at least one signal quality parameter of the first signal and of the second signal, respectively, and to determine settings and/or signal processing methods for a hands-free device of the vehicle on the basis of a comparison of at least one signal quality parameter of the respective first and second signals, whereby a signal quality of a signal to be transmitted by the first communications device to an external communications device is improved.

Abstract: An embodiment relates to a computing device for determining a signal quality of a communications connection, wherein the computing device is configured to receive a first signal of a test sequence of a first communications device and a second signal of a test sequence of a second communications device connected to the first communications device and comprised in a vehicle, and wherein the computing device is configured to determine at least one signal quality parameter of the first signal and of the second signal, respectively, and to determine settings and/or signal processing methods for a hands-free device of the vehicle on the basis of a comparison of at least one signal quality parameter of the respective first and second signals, whereby a signal quality of a signal to be transmitted by the first communications device to an external communications device is improved.