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001 to 0.164 cm/cm /cm and the reliabity was 0.99. The method error for rhinometry ranged between 0.001 to 0.37 cm/cm /cm and the reliability between 0.99 to 1. Difference between standing and sitting position was found only in the pharyngeal airway in terms of volume (P = 0.025) and mean area (P = 0.009) with smaller airway in sitting position. The results indicate that acoustic pharyngometry and rhinometry are reliable methods to perform repeated measures of the upper airway dimensions especially in the standing mirror position. It may