Abstract: Methods and systems are provided for generation of lower-frequency tactile energy (e.g., vibration) of a vehicle system based on audio signals. In one example, a method may include acquiring an audio signal from an audio system, generating a motor input command, and applying the motor input command to at least a first traction motor and a second traction motor to create a resultant vibrational force.

Abstract: Mounting systems are described for mounting a vehicle component to an interior surface of a vehicle body panel. An exemplary mounting system may include a locking mount that can be secured to the interior surface of the vehicle body panel by a structural patch. The vehicle component may be an exciter that can be secured to the locking mount to achieve positive contact relative to the vehicle body panel and achieve desired acoustic requirements for broadcasting audio signals.

Abstract: Methods and systems are provided for generation of lower-frequency tactile energy (e.g., vibration) of a vehicle system based on audio signals. In one example, a method may include acquiring an audio signal from an audio system, generating a motor input command, and applying the motor input command to at least a first traction motor and a second traction motor to create a resultant vibrational force.

Abstract: An exhaust system for an engine has a volume element such as a muffler or a silencer. First and second exhaust pipes are connected as dual exhaust pipes upstream of or downstream of the volume element. The first exhaust pipe has a first length (L1). A valve is positioned in the second exhaust pipe at a distance (D) from the volume element. The distance D is a fraction of L1 such that the second pipe is a resonator for the first pipe with the valve in a closed position. A method of controlling exhaust noise includes positioning a valve in the first exhaust pipe at a distance (D) from a volume element with D being a specified fraction of a length of the second exhaust pipe, and closing the valve such that the first pipe provides a resonator for the second pipe to counteract standing wave in the second pipe.

Abstract: An exhaust system for an engine has a volume element such as a muffler or a silencer. First and second exhaust pipes are connected as dual exhaust pipes upstream of or downstream of the volume element. The first exhaust pipe has a first length (L1). A valve is positioned in the second exhaust pipe at a distance (D) from the volume element. The distance D is a fraction of L1 such that the second pipe is a resonator for the first pipe with the valve in a closed position. A method of controlling exhaust noise includes positioning a valve in the first exhaust pipe at a distance (D) from a volume element with D being a specified fraction of a length of the second exhaust pipe, and closing the valve such that the first pipe provides a resonator for the second pipe to counteract standing wave in the second pipe.