The present invention relates to a system for vortex energy harvesting for downhole applications and a method thereof, the system comprising: one or more electro acoustic technology assemblies mounted downhole in close proximity to a fiber optic cable that is part of a fiber optic distributed acoustic sensing system connected back to a surface distributed acoustic sensing interrogator; and one or more vortex energy harvesters attached to each of the electro acoustic technology assemblies and exposed to a fluid flow in the downhole application.