Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5124180 | Journal of Voice | 2017 | 8 Pages |
SummaryObjectivesPhonation is influenced by hearing as a feedback mechanism. The purpose of the present study was to compare selected acoustic parameters in children using cochlear implants (CIs), those using hearing aids (HA), and their normal-hearing (NH) peers.MethodsThe participants were 15 children using CI (mean age: 72âmonths), 15 children using HA (mean age: 74âmonths), and 15 NH children (mean age: 77âmonths). The vowel /a/ was produced to measure perturbation and mean fundamental frequency. The six Persian vowels in /CbVCd/ were obtained to extract vowel duration. Data were analyzed by one-way analysis of variance.ResultsResults revealed a statistically significant difference between the NH group and the HA group regarding fundamental frequency (F2,51â=â3.443, Pâ<â0.05), jitter local (F2,51â=â1.629, Pâ<â0.05), jitter local absolute (F2,51â=â6.519, Pâ<â0.001), jitter rap (F2,51â=â7.151, Pâ<â0.001), jitter ppq5 (F2,51â=â5.894, Pâ<â0.001), shimmer local (%) (F2,51â=â8.070, Pâ<â0.001), shimmer local (dB) (F2,51â=â3.884, Pâ<â0.05), shimmer apq3 (F2,51â=â4.926, Pâ<â0.05), shimmer apq5 (F2,51â=â8.442, Pâ<â0.001), and harmonic-to-noise ratio (F2,51â=â4.117, Pâ<â0.001). The mean values of the duration of all six vowels were significantly greater in children with CI and HA than in NH children (Pâ<â0.001).ConclusionIt seems that after 8âmonths of using CI, auditory control of voice production would be enabled. Furthermore, children with hearing impairment potentially regard vowel sound duration as a distinguishing feature, whereas in NH speakers, the duration has the least effect in vowel identification.