title: Higher pitch in BT is not universal: acoustic evidence from Quiche Mayan.
mesh_terms: D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D005260:Female; D006166:Guatemala; D006801:Humans; D007223:Infant; D008425:Maternal Behavior; D009034:Mother-Child Relations; D013060:Speech; D013061:Speech Acoustics; D014481:United States