A protective system for a motor vehicle with automatic electrical seat position control and/or automatic electrical steering wheel adjustment is provided. The protective system includes a seat position control unit, a steering wheel adjustment control unit, an accident detection device and a communications connection. The seat position control unit is deactivates the automatic electrical seat position control. The steering wheel adjustment control unit is deactivates the automatic electrical steering wheel adjustment. The accident detection device detects a traffic accident of the motor vehicle. The communications connection connects the accident detection device to the seat position control unit and/or the steering wheel adjustment control unit. The accident detection device outputs at least one accident signal to the communications connection in the event of the detection of a traffic accident of the motor vehicle.

A method to arm an airbag, the method including determining, by a system device, that an arming condition for the airbag has been met; delivering a communication to a master device from the system device to inform the master device that the arming condition has been met; snooping the communication by an expansion device; and arming the airbag by the expansion device in response to snooping the arming condition.

A protective system for a motor vehicle with automatic electrical seat position control and/or automatic electrical steering wheel adjustment is provided. The protective system includes a seat position control unit, a steering wheel adjustment control unit, an accident detection device and a communications connection. The seat position control unit is deactivates the automatic electrical seat position control. The steering wheel adjustment control unit is deactivates the automatic electrical steering wheel adjustment. The accident detection device detects a traffic accident of the motor vehicle. The communications connection connects the accident detection device to the seat position control unit and/or the steering wheel adjustment control unit. The accident detection device outputs at least one accident signal to the communications connection in the event of the detection of a traffic accident of the motor vehicle.

A speech communication device includes microphones configured with: microphones M1 and M2 disposed at positions which are axisymmetric with a centerline in a width direction of a housing as a symmetric axis; and a microphone M3 disposed at a position which is on the centerline and closer to a speaker than the microphones M1 and M2 are. The speech communication device is further equipped with: a sound processor which includes: a beam former which is connected to the microphones M1 and M2 and forms a bidirectionality in which directionality is strong in two directions each perpendicular to the centerline and is weak in two directions each along the centerline; and an echo cancel unit which is connected to the beam former and the microphone M3 and removes a sound signal having been output from the microphone M3 from a sound signal having been output from the beam former.

A speech communication device includes microphones configured with: microphones M1 and M2 disposed at positions which are axisymmetric with a centerline in a width direction of a housing as a symmetric axis; and a microphone M3 disposed at a position which is on the centerline and closer to a speaker than the microphones M1 and M2 are. The speech communication device is further equipped with: a sound processor which includes: a beam former which is connected to the microphones M1 and M2 and forms a bidirectionality in which directionality is strong in two directions each perpendicular to the centerline and is weak in two directions each along the centerline; and an echo cancel unit which is connected to the beam former and the microphone M3 and removes a sound signal having been output from the microphone M3 from a sound signal having been output from the beam former.