Stimuli are individually calibrated to near-detection threshold to expose tACS phase effects

Evidence

Target sounds were modulated at the tACS frequency (4 Hz) to give listeners the opportunity to sample the target at fixed phase angle on consecutive tACS cycles. The relative level of target and background was set individually to a value near detection threshold determined beforehand. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4777