OHSU researchers help develop portable device to assist those combating balance disorders
...y hear a high-pitched tone that becomes higher and louder the farther they lean forward. If subjects lean ba..., they hear a low-pitched tone that drops and gets louder as they lean back. In addition, the tone becomes louder in the left ear when a subject leans too far......ith fMRI, the scientists presented tones that were louder than the soft test tones that are commonly used in electrophysiological studies. "Larger and larger areas of the auditory cortex become active when we do this, but our challenge was to preserve the broad topography by not presenting sounds too loudly...