N1m amplitudes and latencies. (A, B) Mean amplitudes ± SD (A) and latencies (B) of the four N1m peaks (grand average of vowel and tone stimulation). * p < 0.05, * p < 0.01, *** p < 0.001. (C, D) Mean ± SD relative amplitudes (C) and relative latencies (D) of the four N1m peaks. Amplitudes and latencies are relative to the first N1m peak.