Water resistanceにおける訓練効果について —声の高さにおける検討—

抄録

The high-pitched blowing exercise is a technique for conducting water resistance with high-pitch voice. This exercise is one of semi-occluded vocal tracts (SOVTE). When we performed high-pitched blowing through a laryngoscope in cases where high-pitched vocalization was difficult, the interval of posterior glottis disappeared, and the voice function also improved.

We conducted a detailed examination of the voice pitch for water resistance. The subjects were 40 healthy young women currently attending our school (age: 19-22 years old), randomly divided into 4 groups: Silent Group, Speaking Voice Group, Chest Voice Group, and Head Voice Group. The examination items were the duration of water resistance before/after training, maximum phonation time (MPT), phonatory function test, physiological voice range, acoustic analysis, and subjective evaluation. As an additional study, we also measured the open quotient (OQ) by a photoglottogram (PGG). We observed no marked changes in the Silent Group before/after training. Regarding the phonatory function test findings,were recognized improvement in the MPT, amplitude perturbation quotient, harmonics-to-noise ratio, and voice handicap index. For the PGG, 25% OQ indicated a favorable level in the Head Voice Group. These findings suggested that the high-pitched blowing exercise was more effective than ordinary water resistance for voice disorder.