AUDITORY FLUTTER-DRIVING OF VISUAL FLICKER.

Changes in the physical flutter rate of a clicking sound induce simultaneous changes in the apparent flicker rate of a flashing light. For example, for one observer a flicker with a frequency of 10 cycles per second was driven downward to as low as 7 cycles per second and upward to as high as 22 cycles per second by changing the rate of initially synchronous auditory clicks. The reverse does not occur-changes in the flicker rate do not induce changes in apparent flutter rates.