Human Perception Model for Ultrasonic Difference Tones

T. Sugimoto, T. Kawabe, K. Kameyama, Y. Morooka, and K. Toraichi (Japan)


ultrasound, difference tone, auditory model, magnetoen cephalography (MEG)


In this paper, we investigate human perception of the difference tone by two ultrasonic sounds. Although it has been generally agreed that the difference tone is a sound which does not exist physically but only in hu man subjective feelings, we doubt its truth. We there fore derive the human perception model for such tone and verify the model by physiological experiments us ing the magnetoencephalography (MEG).

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