Modulation change detection in human auditory cortex: Evidence for asymmetric, non-linear edge detection.

ABSTRACT: Changes in modulation rate are important cues for parsing acoustic signals, such as speech. We parametrically controlled modulation rate via the correlation coefficient (r) of amplitude spectra across fixed frequency channels between adjacent time frames: broadband modulation spectra are biased toward slow modulate rates with increasing r, and vice versa. By concatenating segments with different r, acoustic changes of various directions (e.g., changes from low to high correlation coefficients, that is, random-to-correlated or vice versa) and sizes (e.g., changes from low to high or from medium to high correlation coefficients) can be obtained. Participants listened to sound blocks and detected changes in correlation while MEG was recorded. Evoked responses to changes in correlation demonst

SUBMITTER: Kim SG 

PROVIDER: S-EPMC7368805 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature