Effects of kazoo finger technique as the time of execution

Abstract

Objective: Compare the effect of the technique of Finger Kazoo (FK), according to the execution time, in women with normal voice and larynx. Methods: 45 volunteers emitted the vowel /a:/ before and after three series of the 15 repetitions of FK technique. The times of all repetitions of the technique were timed and summed up, and the subjects were divided into groups according to the total execution time: group I (up to five minutes); group II (five minutes and one second to seven minutes); group III (seven minutes and one second to ten minutes); and group IV (ten minutes and one second to fifteen minutes). The groups I, II, III were 12 subjects in group IV, with eight. Were performed glottal and spectrographic acoustic analysis, auditory perceptual (RASATI scale) and vocal self-assessment. Kruskal-Wallis and post hoc tests were applied. Results: The spectrographic of narrowband had significant decrease noise in high, medium and low frequencies in group IV, compared to group II. In the spectrographic of broadband there was no difference between groups. In all groups, occurred self-reported best voice, without significance. In RASATI, there was significant decrease of hoarseness and asthenia in group I, compared to groups II and III. MDVPA without significance. Conclusion: It was not possible to find an ideal time to perform the FK, but there was a difference in the effects generated by the technique in the subjects who performed the same number of repetitions, with auditory improvement of the voice with up to 5 minutes of FK and improvement in the spectrograph only after 10 minutes. In all groups, qualitative improvement of vocal self-perception was observed.