Method: Subject was exposed to a sine wave of 12500 hz projected through a speaker. It was then adjusted to 12250 hz. Suddenly the subject reported that his tinnitus as gone completely. Disappointingly, we found that the effect only took place in the experimental room of roughly 20 square feet with a sound shielding curtain in the middle. We then replaced the speaker with headphones (that can play a pure sine wave on a high range without undertones). The subject initially reported hearing the tone (with the volume at 100%). After reducing the volume to about 35%, the subject reported hearing his tinnitus again. Raising the volume to 68%, the subject once again found the tone to be cancelling the perceived tinnitus tone completely.

The subject was then asked to adjust the volume coming through the headphones, and he reported that both 40-60% volume and 100% volume seemed to have the same cancelling effect. This means that there is a minimum amplitude necessary to achieve cancellation when possible, and thus this minimal exposure should be considered during treatment as a factor—whether or not to expose a subject to higher than necessary amplification may have both short and long-term effects that are in need of more rigorous testing.

Result: After determining the efficacy of the sine wave selected, the subject removed the headphones and let the effect settle in. He reported first a decrease in volume, then a new and lower frequency of tone to the tinnitus. Using approximate chromatic pitch-matching, he put the original tone at an E (the actual tone was 13. kHZ, which is closer to a flat A #), and the new tone lowered approximately at a high G or G # or, one half 12-step chromatic octave. This new, lowered tone throbs with his heartbeat and changes in timbre with jaw movements as reported with the original tone in Session 1.