Abstract: An exemplary audio enhancement system and method includes providing a first audio signal in a first audio signal path with a first microphone, and processing the first audio signal with a first signal processing structure. The first microphone is optimized for the first signal processing structure in terms of at least one of the first microphone's position and the first microphone's performance. Further included is providing a second audio signal in a second audio signal path with a second microphone, and processing the second audio signal with a second signal processing structure. The second microphone is optimized for the second signal processing structure in terms of at least one of the second microphone's position and the second microphone's performance. The second signal processing structure being different from the first signal processing structure.

Abstract: An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position.

Abstract: A noise and vibration measurement arrangement, system, and method are disclosed. The arrangement is configured to operate with an active road noise control system. The arrangement includes an energy harvester, an acceleration sensor, a signal processor, and a signal transmitter. The energy harvester obtains electrical energy from an ambient energy source. The acceleration sensor is configured to generate a sense signal. The signal processor is configured to provide a processed sense signal. The signal processor includes a normal mode of operation and an energy saving mode of operation. The signal transmitter includes a normal mode of operation and an energy saving mode. The energy controller evaluates the electrical energy from the energy harvester to operate in the energy saving mode when the electrical energy is below a predetermined energy level and to operate in the normal mode when the electrical energy is above the predetermined energy level.