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Changes in the articulation of 5 Japanese vowels before and after tonsillectomy were compared using the formants as indicators. Data from 40 patients were analyzed and those from 10 healthy volunteers were adopted as control. The comparison of formant frequencies before and 1 month after operation revealed that F1, F2 and F4 remained within the range of(More)
A simplified method for the diagnosis of sleep respiratory disorders in children was explored on the basis of visual inspection. The subjects were 31 children suffering from symptoms of upper airway constriction. Polysomnography was carried out on all patients to measure the mesopharyngeal pressure amplitude (MPA). The patients were divided into the(More)
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