None (healthy male volunteers)
Conditions
Interventions
The first assessment is the day 0. The subjects were applied first assessment of stroboscopic examination, aerodynamic assessment, acoustic analysis, GRBAS scale, and vocal fatigue index at ENT depar
Sponsors
Department of Otolaryngology Head and Neck Surgery Graduate School of Medicine Kyoto University
Eligibility
Sex/Gender
Male
Inclusion criteria
Inclusion criteria: Healthy volunteers who agree to join this study. Over 20 years men for agreement. No organic or functional diseases of larynx.
Exclusion criteria
Exclusion criteria: The subjects with a history of radiation therapy for the larynx. The subjects who underwent phonomicrosurgery during this 6 months. Smokers The subjects who cannot follow the doctors instruction. The subjects with a heart or lung disease, who easily become tired upon phonation. The subjects who are judged as inappropriate candidates by the doctor.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Affected degree of each vocal assessment, vocal fatigue index and stroboscopic examination between 1st and 2nd vocal loading. Stroboscopic examination, aerodynamic assessment, acoustic analysis, GRBAS scale, and vocal fatigue index are performed after vocal loading. Aerodynamic assessment includes maximum phonation time(MPT),mean flow rate(MFR) and AC/DC ratio: vocal efficiency index. Acoustic analysis evaluates pitch perturbation quotient(PPQ),amplitude perturbation quotient(APQ),noise to harmonic ratio(NHR). | — |
Countries
Japan
Contacts
Public ContactMami Kaneko
Graduate School of Medicine Department of Otolaryngology Head and Neck Surgery
Outcome results
None listed