US Patent 11428490 Inaudible frequency suppressor

A sound suppressor for a sound produced by a generator of rapidly expanding gaseous fluid is provided. The sound suppressor includes a sound suppressor body having an inner longitudinal through bore with an inlet and outlet. The sound suppressor inlet receives rapidly expanding gaseous fluid from the sound generator. The sound suppressor body has an outer body radially spaced from the longitudinal bore. The sound suppressor body has a plurality of individualized control volume ports fluidly connecting the through bore with the outer surface of the body.