The Effects of Age and Gender on Laryngeal Aerodynamics in the Children Population.

Objectives: Normal voice can be differentiated from dysphonic voices by comparing their characteristics using an established normative database. Pediatric normative data using the Phonatory Aerodynamic System (PAS) have been established in a preliminary study for English-speaking children. However, aerodynamic measures, including physical characteristics varying by geographic region, race, and culture, must be investigated between children with different native languages. Aerodynamic analysis of connected speech requires the collection of language-specific samples and the establishment of language-specific norms. Thus, the main purpose of the present study was to establish pediatric normative data using the PAS for a large pediatric population of healthy Turkish-speaking children of 4-17.11 years of age. Another research aim was to determine age-dependent and/or gender-dependent aerodynamic parameters for this pediatric population.

Methods: In total, 120 children were divided into four age groups: Group I, 4-5.11 years; Group II, 6-9.11 years; Group III, 10-13.11 years; and Group IV, 14-17.11 years. An equal number of male and female participants were assigned to each group. The PENTAX Medical PAS Model 6600 was used. Descriptive statistics for 56 parameters across six protocols were expressed as mean, standard deviation, and range values. Each protocol was analyzed for age, gender, and age-gender interaction.

Results: Age was the most predominant factor, affecting 37 of the 56 aerodynamic parameters investigated. Gender and age-gender factors were observed at an equal frequency, each affecting 16 parameters. Pitch-related parameters were the most altered parameters in each protocol. Age-gender interaction was observed in parameters related to the expiratory airflow.

Conclusions: This study established the normative values of phonatoary aerodynamics for a large pediatric population with a wide age range and developed a normative database for healthy Turkish-speaking children. This is the first study to investigate running speech protocol in aerodynamic assessment.