2.2.2. Auditory speech
Stimuli were digitally recorded samples (audio sample rate:
44.1 KHz in 16 bits) of a female speaker pronouncing the syllables
/ba/ (standard), /da/ (deviant), and /bi/ (target). The /ba/ syllable
was the audio recording taken from the /ba/ video used in the audiovisual
paradigm (see experiment 2) ensuring that the standard
stimuli were acoustically identical in both experiments. Stimuli
were presented binaurally through headphones at approximately
60-dB SPL above the participant’s HTL. The duration of the stimuli
was 325 ms with a mean ISI interval of 620 ms, varying randomly
between 520 and 720 ms. Stimuli were matched for intensity using
Praat software (Boersma and Weenink, 2009).