On Acoustic Vibration Transformation for Low Level Vibrations

In the past few years good research has been carried on the energy harvesting systems. Energy harvester system is based on the transformation of acoustic vibrations into electrical energy. This harvested energy is being used for niche applications because of its reduced power consumption in modern day electronic systems. Vibration is one of the better ways in terms of quality power and is considered to bean efficient among other ambient energy sources, such as solar energy and Temperature difference. Piezoelectric and electromagnetic devices are mostly used in conversion of vibrations to ac electric power. This input stress/vibration power can be generated by machines, humans and its frequency is generally in the range of Hz to KHz. These vibrations are practically available in the form of different noises. This paper gives an introduction to energy harvesting fundamentals, analysis of low level acoustic vibration transformation to electrical power have been described through simulation results and Comparison of harvested power through different levels of vibrations in form of noise inputs are also presented.