Figure 1.

Left: Waveforms of the CV‐syllables /da/, /ba/, and /ka/ which constituted the dichotic stimuli. Right: power spectrum densities of the consonants /d/, /b/ and /k/ forming the CV‐syllables. The spectral overlap between/d/and/b/was estimated to be about 93%, so that the CV‐syllables /da/ and /ba/ were named as “competing”. The overlap was reduced to 23% for /d/ and /k/, forming the noncompeting syllables /da/ and/ ka/ which constituted the control stimuli in the present study (dichotic sham condition). [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]