Nine subjects with normal hearing were exposed for 3 min to 50‐ and 100‐dB‐SPL, 4‐kc/sec tones during the performance of a task. Three tasks were used: long division, light tracking, and reverie. Each subject received 3 replications of every task/level‐of‐exposure combination. Performance of task during exposure was found to have no significant effect on the magnitude of TTS. Repeat‐reliability measures showed the subjects to be reasonably consistant in their responses.