Technical Abstract: Behavior and sounds associated with mating of mass-reared irradiated and untreated (non-irradiated) Bactrocera tryoni (Froggatt) males were analyzed using synchronous acoustic and video recordings. The flies tested were from a population used in sterile release programs that help maintain fruit-fly-free areas in Australia. Male fruit flies typically produce three distinct types of sounds in different contexts, 'calling', 'courtship', and 'copula' sounds, as mating progresses. 'Calling' sounds are wing-vibration pulse trains of variable, relatively long duration that most often occur before the male orients toward the female. 'Courtship' sounds are rapid trains of relatively constant duration that occur after the male has oriented toward the female. 'Copula' sounds are produced after mounting. Although the frequencies were similar, the temporal characteristics of calling and courtship sounds differed significantly between irradiated and untreated males. Such differences have the potential to affect mating competitiveness, but no differences were observed in the proportion of irradiated and untreated males that copulated in the laboratory. It was determined also that the wingbeat frequencies of flight, calling, courtship, and copula sounds are significantly correlated within individual flies, possibly because all these vibrations are produced by the same flight motor, with the amplitude of vibration affected by the positioning of the wings relative to "stops" on the thorax. Wingbeat frequency was not correlated with wing area. The results of these analyses are discussed in relation to comparable studies of Mediterranean fruit fly and other sound-producing tephritids.