A subject who had a tinnitus with 10 000‐Hz pitch equivalent in the left ear and no tinnitus in the right ear was exposed in the left ear to a steady tone of 2000 Hz, 107 dB SPL, for 10 min. This exposure resulted in a permanent tinnitus in both ears with similar pitch of approximately 10 000 Hz and loudness of 50–55 SPL (5–10 dB SL). When the left ear of this subject was exposed to a steady 500‐Hz pure tone at 121 dB SPL for 21 min, tinnitus disappeared temporarily from the stimulated ear but was heard in the nonstimulated ear. In the left ear: 3 h after stimulation, tinnitus reappeared as a mixture of multiple pitches superimposed upon broadband noise and/or low‐pass filtered noise; 24 h after stimulation, tinnitus pitch changed to 3260 Hz, two days later to 5100 Hz, three days later to 8310 Hz and one week later to the original 10 000 Hz and has remained there since. In the nonstimulated right ear: Immediately after cessation of stimulation, tinnitus pitch was 6700–8000 Hz for 48 h; thereafter, tinnitus has been fluctuating between 8000–9000‐Hz tone and a narrow‐band noise centered around 7986 Hz with a bandwidth of 2710 Hz; the tinnitus did not return to the previous pre‐exposure pitch of 10 000 Hz until about four weeks after exposure. We suggest that these contralateral effects of tinnitus are mediated by the central auditory system.