Working in rotary electromagnetic energy harvester. I am facing VFD Noise problems (Electromagnetic Interference) in the setup which in turn makes it difficult to capture the lower electromagnetic output voltage in DSO. Because of conducted noise in the power supply side and radiated noise at high frequency in the motor lead. How to capture the voltage without any noise like in your paper titled "Hybridizing piezoelectric and electromagnetic mechanisms with dynamic bistability for enhancing low-frequency rotational energy harvesting"?.