Inflated game ball having long lasting pressure retention with decreased noise

Abstract From the Canadian patent

A pressurized game ball including an elastomeric wall defining a cavity containing a compressible inflation gas that Includes predetermined mixed amounts of air and a low permeability gas which effectively enables the ball to retain its pressurized state within a desired range of pressures for a period of time significantly longer than the ball would remain pressurized if the inflation gas were air alone with the improvement being that the noise resulting when an aforesaid gas system is caused to resonate is substantially lessened by including an amount of material sufficient to disturb the sonic resonance in the ball cavity.