Adult 3 Female 3 Humans 3 Male 3 Phonetics 3 Speech Acoustics 3 Speech Perception 3 adult 3 article female 3 human 3 human experiment 3 male 3 phonetics 3 speech 3 speech perception 3 Adaptation 2 Phonetic variability 2 Speech perception 2 Acoustic Stimulation 1 Acoustic features 1 Adaptation, Physiological 1 Adaptation, Psychological 1 Attention 1 Categorization 1 Continuous speech recognition 1 Fundamental frequencies 1 Harmonics-to-noise ratios 1 Highly-correlated 1 Individual Differences 1