title: Fundamental voice frequency and jitter in girls and boys measured with electroglottography: influence of age and height.
abstract: The fundamental frequency and jitter of the voice was measured by electroglottography in 71 children between the age of 7 and 15 years. In this series of children the fundamental frequency and jitter did not depend on the gender. The median (range) fundamental frequency was 244 (182-331) Hz in girls and 250 (205-293) Hz in boys. It decreased with increasing height (r = -0.59; P < 0.0005) and age (r = -0.57; P < 0.001). The median jitter ratio was 9.7 (1.6-33.3) in girls and 10.3 (2.0-4.3) in boys. The jitter ratio was negatively related to height (r = -0.31; P < 0.05), but not to age.
authors.affiliation: Bureau of the Dutch Growth Foundation, University of Leiden, The Netherlands.
authors.forename: B
authors.initials: B
authors.lastname: Linders
authors.forename: G G
authors.initials: GG
authors.lastname: Massa
authors.forename: B
authors.initials: B
authors.lastname: Boersma
authors.forename: P H
authors.initials: PH
authors.lastname: Dejonckere
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001827:Body Height; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D014833:Voice Quality