The effects of pitch and pitch strength on an auditory-evoked NIm

The aim of this paper was to determine whether the latency and/or amplitude of the NIm deflection of the auditory-evoked magnetic fields are influenced by the delay and number of iterations of iterated rippled noise, which are related to pitch and pitch strength, respectively. The results indicate that the NIm amplitude decreased sharply for delays between 16 and 32 ms, suggesting that the NIm amplitude reflects the lower limit of the audible pitch range. The NIm latency increases with increasing delay of up to 8-16 ms and then decreases again for delays longer than 16 ms. The behavior of the latency may reflect the balance between the pitch-related component of the NIm and a specific pitch-unrelated component.