A sound attenuating duct unit suitable for connection to an outlet of a gas turbine and an improved heat recovery apparatus for use with such a turbine are disclosed. an elongated hollow acceleration tube having a firing end and an exit end; b. Inasmuch as one element common to advancing years is an increased level of generalized inflammation, the invention further lends itself to reducing or delaying this aspect of aging, one factor in what is known as sarcopenia. The receive-side datapath configured is configured to operate at two frequencies to accommodate the programmable logic in the integrated circuit. Two first-electrodes are located on opposite ends of a first electrode plate and two second-electrodes are located on opposite ends of a second electrode plate. The managing apparatus successively acquires and monitors the operation status of each distributed power generation system.