A magnetic controlled loading device in combination of a power generating set and an adjusting drive mechanism having a flywheel, a shaft, a transmission element, a magnetic controlled loading device, a micro power generating set and an adjusting drive mechanism integrated into one single unit. Pressurized air or other gas is intermittently supplied through a woven jacket, a mandrel, a check valve and into the interior of an extruded rubber hose. The channel frequency response is then determined based on the fast Fourier transform of the channel impulse response.