Comparison of the effect of artificially increasing the length of the vocal tube on voice and vocal fold vibration in people with cleft palate and normal people.

Comparison the immediate effect of straw phonation on the acoustic and glottal performance in two group of Persian-speaking children with cleft palate and normal.

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20230403057804N1

Enrollment

Registered

2023-04-15

Start date

2023-04-09

Completion date

Unknown

Last updated

2023-05-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

The effect of semi-occluded vocal tract on acoustic characteristics and glottal performance in cleft palate and normal subjects..

Interventions

Intervention 1: Intervention group: children with cleft palate. Intervention 2: Control group: normal children.

Eligibility

Sex/Gender

All

Age

6 Years to 12 Years

Inclusion criteria

Inclusion criteria: Have a compensatory production error (group of people with cleft palate). have velopharyngeal insufficiency due to cleft palate (group of people with cleft palate). Have healthy bilateral hearing (group of normal people and with cleft palate). Do not have a disease that causes voice disorders (group of people with cleft palate). Do not have other speech therapy in the field of voice therapy and correction of compensatory errors at the same time as studying (group of people with cleft palate). They do not have cleft palate syndrome, fistula, cold, upper respiratory tract infection, and neurological, cognitive, and motor speech control problems (group of normal people and with cleft palate). Children aged 6 to 12 years with Persian-speaking (group of normal people and with cleft palate).

Exclusion criteria

Exclusion criteria: Failure to record data or unanalyzable data. A person's inability to do tasks despite the therapist's training and modeling. The unwillingness of the child and the family to cooperate until the end of the study.

Design outcomes

Primary

Measure	Time frame
Fundamental frequency. Timepoint: Immediately before and after the intervention. Method of measurement: PRAAT software.	—

Secondary

Measure	Time frame
Fundamental frequency. Timepoint: Immediately before and after the intervention. Method of measurement: PRAAT software.;Contact Quotient. Timepoint: Immediately before and after the intervention. Method of measurement: Electroglottography device.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactKowsar Baghban

Hamedan University of Medical Sciences

baghban.kowsar@gmail.com+98 81 3838 1571

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026