Abstract: A method of generating a drive signal for a loudspeaker in an exhaust system of an engine of a vehicle or inside or outside a passenger cell includes providing a predetermined source signal for a desired additional sound in a time domain comprising a plurality of signal components of different frequencies; analyzing the source signal based on a phase of the source signal and/or a phase of at least one oscillation in the source signal; identifying a phase of engine noise and/or a phase of at least one oscillation existing in engine noise; shifting the phases of the source signal and/or the oscillation existing in the source signal based on phases identified in engine noise and/or in oscillation existing in engine noise, the relationship of phases of individual oscillations of the source signal among each other being preserved; and generating the drive signal based on the phase-shifted source signal.

Abstract: In a method of influencing the exhaust noise of a motor vehicle, a control unit generates noise package signals, the control unit transmits the noise package signals individually or so as to superimpose a basic signal to a loudspeaker associated with an exhaust branch of the motor vehicle, and the loudspeaker converts the individual noise package signals or the basic signal superimposed with the noise package signals into sound waves, with individual noise package signals being emitted by the loudspeaker as time-limited sound wave packages, so-called noise packages. Furthermore, an exhaust system is shown.

Abstract: A method of generating a drive signal for a loudspeaker in an exhaust system of an engine of a vehicle or inside or outside a passenger cell includes providing a predetermined source signal for a desired additional sound in a time domain comprising a plurality of signal components of different frequencies; analyzing the source signal based on a phase of the source signal and/or a phase of at least one oscillation in the source signal; identifying a phase of engine noise and/or a phase of at least one oscillation existing in engine noise; shifting the phases of the source signal and/or the oscillation existing in the source signal based on phases identified in engine noise and/or in oscillation existing in engine noise, the relationship of phases of individual oscillations of the source signal among each other being preserved; and generating the drive signal based on the phase-shifted source signal.

Abstract: In a method of influencing the exhaust noise of a motor vehicle, a control unit generates noise package signals, the control unit transmits the noise package signals individually or so as to superimpose a basic signal to a loudspeaker associated with an exhaust branch of the motor vehicle, and the loudspeaker converts the individual noise package signals or the basic signal superimposed with the noise package signals into sound waves, with individual noise package signals being emitted by the loudspeaker as time-limited sound wave packages, so-called noise packages. Furthermore, an exhaust system is shown.

Abstract: The exhaust flap closes an exhaust duct. An exhaust-gas stream flows directly onto a closure plate which closes the cross section of the exhaust duct at least partially. A flow body is disposed next to the closure plate, onto which the exhaust-gas stream can flow and which takes effect as an actuator for the exhaust flap.

Abstract: The exhaust flap closes an exhaust duct. An exhaust-gas stream flows directly onto a closure plate which closes the cross section of the exhaust duct at least partially. A flow body is disposed next to the closure plate, onto which the exhaust-gas stream can flow and which takes effect as an actuator for the exhaust flap.