When I played the scale to participants in my experiments, I found a range of reactions. In some folks, the stimulus induced motion sickness—nausea and disrupted balance—and a mix of emotional disturbances. Most people became nervous and agitated, but a few felt relaxed. One person likened the experience to morphine; another felt extreme anger. Once, after a long day of testing—using a surround-sound speaker array—I too fell victim to the unsettling effects. Now I plug my ears before I unleash the tones.