Sixteen vocalizations from four parakeets were acoustically analyzed. A call usually lasted 140–160 msec and contained between seven and nine notes. The power spectrum of the call indicated that most of the energy was contained in a narrow band of frequencies between 2.0 and 4.0 kHz. These frequencies were also the region of best sensitivity in the parakeet audibility curve. A time‐frequency spectrum was also obtained by measuring the frequency of the first cycle in successive 1.0‐msec steps throughout the call. This analysis revealed that the calls could be discriminated on the basis of whether the first or last note contained relatively pure frequencies. The “constancy of intonation” (Δf/f) was determined for these notes by calculating the standard deviation of the within‐note frequency variations (Δf) and dividing it by the center frequency (f). The “constancy of intonation” was only one to two times larger than the frequency DLs in this species and supports the hypothesis that vocalization performance is related to hearing capacity in birds.