Abstract
There is a frequency locality in the auditory cortex. The aims of this study are reconstructing audio signal from fMRI (functional Magnetic Resonance Imaging) data measured primary auditory cortex of human. In order to develop a sound decoding system from brain activity, it is necessary to distinguish brain activities which respond to several frequencies of stimuli. Therefore the first stage of this study is attempted to establish a technology to decode a musical scale using fMRI. In this paper, it is shown by t-test that the brain activities have significant differences which respond to semitone-difference stimuli with 3-mm spatial resolution of fMRI imaging data. Thus, at around 2kHz, a prospect that decoding musical scale from brain activity data is possible on the frequency resolution of a semitone is obtained.
