Rediscovery of a seventh sense: humans produce, perceive, and process ultrasound
Henry Johannes Greten
IntroductionWe present novel evidence that humans are capable of producing, perceiving, and cortically processing ultrasound (US), extending the recognized limits of human auditory function. This previously unacknowledged sensory ability was identified in an expert practitioner of the traditional Chinese health exercise “The Six Healing Sounds.Methods and resultsHigh-resolution recordings demonstrated deliberate vocal emissions reaching up to 35 kHz, with nearly one third of the acoustic energy