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Table 1 Centroid frequency, latency, and relative probability for each spectral-temporal feature (gamma, beta, theta-1, theta-2, and theta-2b) and each contrast condition: non-speech (noise-tone), vowel (/i/–/a/), and consonant (/da/–ba/)

From: Spectral-temporal EEG dynamics of speech discrimination processing in infants during sleep

  Noise-tone /i/–/a/ /da/–/ba/
Gamma    
Frequency (Hz) 33.94 35.71 35.71
Latency (ms) 22 20 59
Relative probability 0.25 0.09 0.38
Beta    
Frequency (Hz) 17.56 16.28 18.47
Latency (ms) 56 56 147
Relative probability 0.37 0.16 0.40
Theta-1    
Frequency (Hz) 5.07 4.70 2.09
Latency (ms) 58 69 187
Relative probability 1.00 0.62 0.92
Theta-2    
Frequency (Hz) 7.05 5.91 5.76
Latency (ms) 194 242 225
Relative probability 0.78 0.54 0.76
Theta-2b    
Frequency (Hz) 2.98 2.83 2.90
Latency (ms) 481 493 516
Relative probability 0.26 0.20 0.38