Investigation about the effect of VFEs on VF

Not Applicable

• Conditions: Condition 1: voice disorders. Condition 2: Vocal fatigue.; Voice and resonance disorders; Dysphonia; R49.0

• Registration Number: IRCT20220116053728N1
• Lead Sponsor: Iran University of Medical Sciences

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Last Update Posted: 8 March 2022

Recruitment & Eligibility

• Status: Pending
• Sex: All
• Target Recruitment: 42

Inclusion Criteria

The participant must work at least three days a week that directly contacts customers.
The participant must have at least 1.5 hours of speaking on each working day.
The participant should often use their maternal language to communicate with customers.
The participant often uses a mask in the working environment.

Exclusion Criteria

The applicant has a history of neurological, respiratory, head and neck, pharyngeal/laryngeal, allergies, asthma, reflux, and/or hearing system diseases or surgeries.
The applicant have a vocal training in the last six months ago.

Study & Design

• Study Type: interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Scores in the three sections of the vocal fatigue index (VFI). Timepoint: On the day of training and one day before the start of training (in the intervention group) or one day before the start of the 14 days in the control group (pre-term data); One day after completing the 14-day training period (in the intervention group) or the waiting period in the control group (post-term data). Method of measurement: Persian version of Vocal Fatigue Index.

Secondary Outcome Measures

Name	Time	Method
Total score of the voice handicap index (VHI). Timepoint: On the day of training and one day before the start of training (in the intervention group) or one day before the start of the 14 days in the control group (pre-term data); One day after completing the 14-day training period (in the intervention group) or the waiting period in the control group (post-term data). Method of measurement: Persian version of Voice Handicap Index.