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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Int J Psychophysiol. 2007 Sep 26;67(1):1–16. doi: 10.1016/j.ijpsycho.2007.09.001

Fig. 1.

Fig. 1

Waveforms (A) and corresponding amplitude spectra (B) of the tonal and phonetic stimuli used in the dichotic oddball task. (A) Because all three tonal stimuli had the same envelope, only the target waveform (A4) is shown. For the phonetic stimuli, the target waveform (/ta/) was unique in having an unvoiced consonant and a 57 ms voice onset time, in contrast to the nontargets (/ba/ and /da/; voiced consonants and immediate onset. All stimuli were 250 ms in duration and matched for sound pressure level. (B) Tonal and phonetic targets (black lines) were intermediate in frequency with respect to their two nontargets (gray lines).