Cyclone sound absorber

Claim 1

A SOUND DAMPING INSTALLATION WHICH INCLUDES: A CYCLONE TYPE SOUND ABSORBER HAVING AN UPPER ANNULAR CHAMBER, A PLURALITY OF SERIALLY ARRANGED PLATE MEANS CONNECTED TO ONE OF THE WALLS OF SAID CHAMBER AND EXTENDING INTO AND FORMING GAS EXPANSION NOZZLE MEANS IN THE PASSAGE FORMED BY SAID ANNULAR CHAMBER, A FEEDING CONDUIT TANGENTIALLY LEADING INTO SAID ANNULAR CHAMBER FOR FEEDING A GASEOUS MEDIUM THEREINTO, FUNNEL-SHAPED TUBUALR DISCHARGE MEANS FORMING THE INNER WALL OF SAID CHAMBER AND EXTENDING INTO SAID ANNULAR CHAMBER FROM THE TOP IN COAXIAL RELATIONSHIP THEREWITH, SAID FUNNEL-SHAPED TUBULAR MEANS TAPERING INWARDLY TOWARD THE BOTTOM AND HAVING AN AXIALLY ARRANGED INLET AT THE NARROW END THEREOF AND HAVING AN OUTLET AT THE OPPOSITE END EXTERNALLY OF SAID SOUND ABSORBER, THE VOLUME OF SAID CYCLONE TYPE SOUND ABSORBER HAVING THE SAME NATURAL FREQUENCY AS THE MAXIMUM PEAK OF THE DISTURBING MACHINE SOUND TO BE DAMPED, THE SAID TUBULAR MEANS HAVING A LENGTH EQUALLING AN ODDNUMBERED MULTIPLE OF 1/4 OF THE WAVE LENGTH OF THE NATURAL FREQUENCY OF THE VOLUME OF THE SAID CYCLONE TYPE SOUND ABSORBER.