Auditory-evoked brain responses to tone bursts of different frequencies and intensities were recorded from surface electrodes on the skull of unanesthetized parakeets. Evoked response amplitude increased linearly with the log of stimulus intensity. Amplitude-intensity functions were computed using the method of least squares for three different amplitude measures of the evoked response waveform. Extrapolation of the amplitude-intensity functions at each frequency to the x intercept showed a close relation to the parakeets's auditory threshold as measured behaviorally. The best threshold estimates were obtained from the earlier components of the evoked response waveform with the average difference across frequency between evoked response threshold estimates and the species' audibility curve being less than 8 dB. Latency to the first positive peak of the evoked response waveform varies systematically as a function of the frequency and intensity of the stimulating tone.