The subjective experience of annoyance was measured with trained observers, using the tones of the 2-A audiometer as stimuli. A method of paired comparisons was first used which yielded results later verified by a method of equal annoyance gradients. The raw records in decibels indicate that annoyance increases as the pitch of the stimulus varies above or below the range characteristic of human speech. When the audiometer readings are related to Fletcher's contours of equal loudness the records indicate that for the lower half of the loudness series annoyance is directly related to loudness, but that for the upper half of the loudness series annoyance is greatly increased as the frequency of the stimulus is increased.