Complaints and awareness about environmental low-frequency (LF) noise infrasound (IS) have increased in recent years, but knowledge perceptual mechanisms is limited. To evaluate the use of brain’s frequency-following response (FFR) as an objective correlate individual sensitivity to IS LF, we recorded FFR monaurally presented (11 Hz) LF (38 tones over a 30-phon range for 11 subjects. It was fou...