Design and Investigation of Energy Harvesting System from Noise

Abstract

In order to survive in this modern world, electricity is an essential thing. Electricity allows us to power the technology we use every day. Without electricity, people can't imagine their lives. As a developing country, Bangladesh still lacks electricity every day. The electricity supply to the rural areas is very poor. It is known that energy can be converted from one form to another form. As noise is the energy, it can also be converted into various forms of energy. Noise can be represented as a sound that is loud or unpleasant and causes disturbances such as street traffic sounds, construction sounds, airports, etc. Using a suitable transducer, noise (sound) energy can be transferred into a viable source of electricity generation. This can be accomplished by employing a transducer and converting noise-induced vibrations into electrical energy. Our main goal is getting enough energy, reducing the pressure of the main grid of electricity and decreasing fossil fuel imports. This paper presents the design and investigation of an energy harvesting system from noise. In this paper, an application is designed to get energy from noise by using a speaker as a transducer. Voltage has been stepped up by using a transformer, a diode which gives DC value which can be tapped into a battery and provide energy from the battery when it is needed. The embedded device was initially tested by clapping hands and tested further by using car horns. The vibrations created by car horns and other noises have been converted into electrical energy through the principle of electromagnetic induction. In total, the application produced optimal results of 0.5 -1.0 volts which were stepped up using a transformer while maintaining the whole system being low cost and user-friendly.

Novel phononic-crystal-arrayed acoustic metalens for long beam focusing in multi-band

“…Both our finite element simulation and experimental results demonstrate that the proposed two-dimensional quadrilateral lattice array achieves effective acoustic focusing at frequencies of 5800 Hz, 8600 Hz, and 9800 Hz. The proposed multi-band efficient acoustic focusing technique holds promise in the development of acoustic power collecting [27][28][29][30] and has the potential to significantly enhance energy harvesting efficiency.…”