A noise and vibration sensor arrangement configured to operate with an active road noise control system, the arrangement comprising: an energy harvester configured to obtain electrical energy from an ambient energy source ; an acceleration sensor supplied with electrical energy from the energy harvester and configured to generate a sense signal representative of at least one of accelerations, motions and vibrations that act on the acceleration sensor ; a signal processor supplied with electrical energy from the energy harvester and configured to process the sense signal and to provide a processed sense signal, 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; a signal transmitter supplied with electrical energy from the energy harvester and configured to wirelessly broadcast the processed sense signal, 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; and an energy controller configured to evaluate the electrical energy from the energy harvester and to control at least one of the signal processor and 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, characterized in that at least one of the signal processor and signal transmitter is configured to process and/or transmit digital signals with a first data rate in the normal mode and a second data rate in the energy saving mode, the first data rate being higher than the second data rate. an energy harvester configured to obtain electrical energy from an ambient energy source ; an acceleration sensor supplied with electrical energy from the energy harvester and configured to generate a sense signal representative of at least one of accelerations, motions and vibrations that act on the acceleration sensor ; a signal processor supplied with electrical energy from the energy harvester and configured to process the sense signal and to provide a processed sense signal, 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; a signal transmitter supplied with electrical energy from the energy harvester and configured to wirelessly broadcast the processed sense signal, 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; and an energy controller configured to evaluate the electrical energy from the energy harvester and to control at least one of the signal processor and 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, characterized in that at least one of the signal processor and signal transmitter is configured to process and/or transmit digital signals with a first data rate in the normal mode and a second data rate in the energy saving mode, the first data rate being higher than the second data rate. <EOS>