Abstract: The present invention relates to a system comprising an energy harvester device and a signal processing device coupled to the energy harvester device. The energy harvester device includes an elongate resonator beam comprising a piezoelectric material extending between first and second ends. A base is connected to the elongate resonator beam at the first end with the second end being freely extending from the base as a cantilever. A mass attached to the second end of the elongate resonator beam. The signal processing device includes a processor and a memory coupled to the processor. The processor is configured to execute programmed instructions stored in the memory including obtaining a signal from the energy harvesting device. The obtained signal is tracked over a period of time. An environmental impact on the energy harvester device is determined based on the tracked signal.