Voice onset time in Swedish children and adults

Abstract

Voice onset time (VOT) is a temporal acoustic parameter, which reflects the timing of speech motor control. The objective of the work was to obtain normative VOT-data in Swedish children. Thus, 150 children aged 8-11 years old and 36 adults were audio-recorded when producing the plosives in minimal pairs. Measures were made using waveforms and spectrograms. Results show that Swedish children developed adult-like VOT-values between 9 and 10 years. By the age of ten, prevoicing was also found fully adult like in extent. The results indicate that all Swedish adults do not produce voiced plosives with prevoicing. No evident gender differences were found. The obtained VOT-values can be used as normative data when assessing children with speech and language disorders.

Voice onset time in Swedish children with phonological impairment

“…Furthermore, in typically developed children, when prevoicing was well established it was present for all plosives in most cases (13).…”

“…VOT-values above or below one standard deviation from the mean value for the typically developed children in Larsson and Wiman, (15) and Lundeborg, et al (13) were considered as deviant.…”

“…When the speaking rate is lower, both VOT values for voiceless stop consonants and the duration of the following vowel increase (12). Typical Swedish adult values for the voiceless plosives range between 49 and 78 milliseconds and between -91 and -61 milliseconds for the voiced plosives (13). Since voice onset time is considered to reflect the co-ordination between articulatory gestures and phonation (14), VOT measures could be included in cases of suspected verbal dyspraxia and other speech motor disorders.…”

Likelihood ratio calculation for a disputed-utterance analysis with limited available data

“…The prior distributions for the posterior-predictive-density analysis were based on a published summary of VOT measurements, and on formant measurements from a database of recordings of Swedish speakers. Lundeborg et al (2012) reported VOT measurements on Swedish plosives. They found no significant difference between men and women and therefore reported the pooled results.…”

Effect of Age on the Voice Onset Time of Korean Stops in VCV contexts

“…폐쇄음은 입술, 혀, 턱, 후두 사이의 세밀한 협응을 통해서 산출되기 때문에, 음성 제어 능 력을 폐쇄음으로 VOT를 측정할 수 있다고 알려져 있다 (Auzou et al, 2000). Koenig(2000) 폐쇄음의 조음위치는 VOT값에 영향을 미치는 것으로 보고 되며, 선행 연구 (Bona & Auszmann, 2014;Cho et al, 2002;Lundeborg et al, 2012;Han, 2013 (Broersma, 2010;Rami et al, 1999;Shin, 2010). Rami 외 (Kent, 1976;Kummer, 2014).…”