Silencer or muffler

Claim 1

A MUFFLER FOR USE WITH A MOVING GAS STREAM INCLUDING, IN COMBINATION, AN ELONGATED TUBULAR SHELL PROVIDED WITH END WALLS, A PLURALITY OF LONGITUDINALLY SPACED TRANSVERSE WALLS INTERMEDIATE THE END WALLS IN SAID SHELL AND EXTENDING COMPLETELY ACROSS THE INSIDE OF THE SHELL, CERTAIN OF SAID WALLS DEFINING DUAL LOW FREQUENCY RESONATORS AND TRANSVERSE GAS TRANSFER MEANS, SAID DUAL RESONATORS BEING ARRANGED IN ADJACENT RELATION, SAID GAS TRANSFER MEANS BEING SPACED FROM THE LOW FREQUENCY RESONATORS, A PLURALITY OF GAS PASSAGE MEANS EXTENDING LENGTHWISE IN SAID SHELL, ONE OF SAID GAS PASSAGE MEANS PROVIDING A GAS INLET AND ANOTHER OF SAID GAS PASSAGE MEANS PROVIDING A GAS OUTLET FOR THE SHELL, A THIRD GAS PASSAGE MEANS CONNECTING SAID GAS TRANSFER MEANS WITH ONE OF THE LOW FREQUENCY RESONATORS, AND A TUNING TUBE DISPOSED IN AN OPENING IN THE WALL INTERMEDIATE THE DUAL LOW FREQUENCY RESONATORS AND EXTENDING A SUBSTANTIAL DISTANCE INTO EACH OF THE RESONATORS, SAID GAS TRANSFER MEANS AND SAID LOW FREQUENCY RESONATORS AND THIRD GAS PASSAGE MEANS BEING ARRANGED WHEREBY GASES MOVING THROUGH THE MUFFLER FLOW THROUGH BOTH LOW FREQUENCY RESONATORS IN SEQUENCE.