Human vocal emotional expression includes both emotionally inflected speech, and non-verbal emotional vocalisations, like a scream or a sob. These non-verbal vocalisations are intriguing as they are unlike speech in terms of the ways they are produced, with little or no involvement of the articulators (tongue, jaw, soft palate, lips). Instead these vocalisations are dominated by effects of changes in breath control, subglottal pressure, laryngeal tensions and facial expression (Scott et al., 2009).
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