摘要:
An example noise and vibration measurement system and method, which is configured to operate with an active road noise control system, includes obtaining electrical energy from an ambient energy source; supplying an acceleration sensor with electrical energy from the energy harvester; generating with the acceleration sensor a sense signal representative of at least one of accelerations, motions and vibrations that act on the acceleration sensor; supplying a signal processor with electrical energy from the energy harvester, the signal processor having a normal mode of operation with a first energy consumption and an energy saving mode of operation with a second energy consumption that is lower than the first energy consumption; and processing the sense signal to provide a processed sense signal. The system and method further comprises supplying a signal transmitter with electrical energy from the energy harvester, the signal transmitter having a normal mode of operation with a third energy consumption and an energy saving mode of operation with a fourth energy consumption that is lower than the third energy consumption; wirelessly broadcasting the sense signal via the signal transmitter; evaluating the electrical energy obtained from the ambient energy source; and controlling at least one of the signal processor and/or signal transmitter to operate in the energy saving mode when the electrical energy from the harvester is below a predetermined energy level and to otherwise operate in the normal mode.
摘要:
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, wherein 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, wherein 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, and wherein the second signal processing structure is different from the first signal processing structure. Still further included is processing the first audio signal and supplying the processed first audio signal to the second signal processing structure, wherein processing the first audio signal includes enhancing the first audio signal for use in the second signal processing structure.
摘要:
The present disclosure provides a method for determining an arrangement of reference sensors for active road noise control (ARNC) in a vehicle by means of an automatic calibration system, wherein the method comprises: mounting a plurality of vibrational sensors on a plurality of structure elements of the vehicle to generate a plurality of vibrational input signals; mounting at least one microphone inside a cabin of the vehicle to capture at least one acoustic input signal; and determining the arrangement of reference sensors from the plurality of vibrational sensors by determining a subset of vibrational sensors which sense the main mechanical inputs of road noise contributing to the at least one acoustic input signal.
摘要:
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.
摘要:
The present disclosure provides a method for determining an arrangement of reference sensors for active road noise control (ARNC) in a vehicle by means of an automatic calibration system, wherein the method comprises: mounting a plurality of vibrational sensors on a plurality of structure elements of the vehicle to generate a plurality of vibrational input signals; mounting at least one microphone inside a cabin of the vehicle to capture at least one acoustic input signal; and determining the arrangement of reference sensors from the plurality of vibrational sensors by determining a subset of vibrational sensors which sense the main mechanical inputs of road noise contributing to the at least one acoustic input signal.