Air modulator acoustic generator

Claim 1

IN SOUND PRODUCING APPARATUS, THE COMBINATION COMPRISING: AN EXCITER INCLUDING A HOUSING AND A DRIVING MEMBER ADAPTED TO BE ACTUATED THROUGH A PREDETERMINED LINEAR RANGE; A SOUND PRODUCING MEMBER INCLUDING A HOUSING HAVING A FLUID PASSAGEWAY FORMED THEREIN; MEANS SECURING SAID SOUND PRODUCING HOUSING IN FIXED RELATION WITH RESPECT TO SAID EXCITER HOUSING; A DISC-LIKE VALVE SEAT MOUNTED IN SAID PASSAGEWAY; A VALVE MEMBER HAVING HEAD AND STEM PORTIONS, SAID VALVE MEMBER BEING SLIDEABLY MOUNTED IN SAID PASSAGEWAY FOR MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS IN WHICH SAID HEAD PORTION IS SPACED FROM SAID VALVE SEAT AND IS SEATED ON SAID VALVE SEAT, RESPECTIVELY; THE LINEAR RANGE THROUGH WHICH SAID VALVE MEMBER MOVES WHEN ACTUATED BETWEEN ITS OPEN AND CLOSED POSITIONS BEING LESS THAN SAID PREDETERMINED RANGE; RESILIENT MEANS CONNECTING SAID VALVE STEM AND THE DRIVING MEMBER OF SAID EXCITER; SAID FLUID PASSAGEWAY INCLUDING AN INTERMEDIATE PORTION OF TOROIDAL CONFIGURATION, AN INLET PORTION HAVING A TANGENTIAL RELATION WITH RESPECT TO SAID TOROIDAL PORTION, AND AN ANNULAR OUTLET PORTION HAVING A CONCENTRIC RELATION WITH RESPECT TO SAID TOROIDAL PORTION; AND SAID PASSAGEWAY, AT SUCH TIMES AS SAID VALVE MEMBER IS IN ITS OPEN POSITION, COOPERATING WITH SAID HEAD PORTION TO DEFINE AN UNOBSTRUCTED PASSAGEWAY INCREASING EXPONENTIALLY IN CROSS-SECTION UP-STREAM AND DOWN-STREAM OF SAID VALVE SEAT.