摘要:

In this study, we searched for changes in spectral features (during the sustained vowels [a] and [i]) and the voice onset time (VOT, of [pa] and [ka]) ofthe ageing voice. A longitudinal study (on 20 participants) and a cross-sectional study (on 265 participants) were conducted. The spectral parameters under consideration were: the difference in amplitude between the first and the second harmonic, the energy difference between the frequency band below 1 kHz and 2–4 kHz, and the energy difference between < 1 kHz and 4–5 kHz. The VOT was also measured. Comparing five age bands of men and women, the cross-sectional study revealed a stronger H2 relative to H1 for women above 60 years pronouncing both vowels [a] and [i]. A relatively stronger spectral level was found between 4 and 5 kHz in elderly men and women (60+) for [i] compared to young men and women (20–29 years). Significant differences in the longitudinal study were not identical to those ofthe cross-sectional study. After a time interval of 30 years, 20 men produced a relatively weaker 2- to 4-kHz part ofthe spectrum and the VOT became much longer. It was impossible to attribute the changes purely to the process of ageing. Situations and emotions also play an important role and contribute to the different findings of the two groups of participants under consider

ISSN:1021-7762    

DOI:10.1159/000266467

出版商:S. Karger AG    

年代:1997

数据来源: Karger

摘要:

This study is part of a larger project, the aim of which is to develop a method for collecting voice data in working places. In this part, maximally sustained phonation was studied to assess its stability in this kind of uncontrolled circumstances. The subjects were 11 female schoolteachers. Different portions of a sustained /a/ and two consecutively produced samples were measured. The acoustic variables measured were fundamental frequency (F0), jitter and shimmer. The results showed that two consecutively produced phonations were quite similar, but the place of the sample within the sustained vowel had a very small but statistically significant effect on the values of F0 and shimmer. Jitter varied quite a lot, and could perhaps be considered to be dependent on the recording circumstances.

ISSN:1021-7762    

DOI:10.1159/000266468

出版商:S. Karger AG    

年代:1997

数据来源: Karger

摘要:

The purpose of the study was to explore an interaction between pathologic voice type and the acoustic prediction of dysphonic severity. One hundred and two phonatory samples, representing a wide range of laryngeal conditons, were categorized by listeners into three voice types: breathy, rough, and hoarse. A second group of trained listeners rated the severity of the samples on a 7-point scale. Twenty-five frequency- and time-domain measures were used to predict perceptual severity. Multiple regression analyses showed that the most useful measure for the prediction of severity across voice types was noise-to-harmonic ratio (NHR). The severity of individual voice types was predicted with differential results on the basis of both short- and long-term measures of perturbation.

ISSN:1021-7762    

DOI:10.1159/000266469

出版商:S. Karger AG    

年代:1997

数据来源: Karger

摘要:

The effect of transglottal pressure on the fundamental frequency of phonation was investigated in 14 subjects (12 adults and 2 children). A sudden change in intraoral pressure was produced during sustained phonation. The effects of this pressure change were not monotonic, even within the modal register (around the upper end of the speaking range). The physical properties of the vocal folds related to the cricothyroid and thyroarytenoid muscles seemed to be important.

ISSN:1021-7762    

DOI:10.1159/000266470

出版商:S. Karger AG    

年代:1997

数据来源: Karger

ISSN:1021-7762    

DOI:10.1159/000266471

出版商:S. Karger AG    

年代:1997

数据来源: Karger

摘要:

The present study addresses the effect of cochlear implantation on nasality in 21 post-lingually deafened Dutch subjects. All subjects received the Nucleus 22 implant (MSP version). Speech recordings were made pre-implantation and 3 and 12 months post-implantation with the implant switched on and off. Nasality measurements were performed on a standard text and on two sentences without nasal phonemes. The results show that post-lingual deafness in individuals can result in a deviant degree of nasality in speech production. However, the nasalance value of 86% of the subjects of our study fell within the normative range defined as the mean ± 2 standard deviations of the normal population. After implantation we found no statistically significant effect of implant use. However, individual nasality values outside the normative range may improve. Furthermore, 12 months post-implantation we found a significant decrease in the variability of the nasalance values obtained for two sentences without nasal phonemes

ISSN:1021-7762    

DOI:10.1159/000266472

出版商:S. Karger AG    

年代:1997

数据来源: Karger

ISSN:1021-7762    

DOI:10.1159/000266473

出版商:S. Karger AG    

年代:1997

数据来源: Karger

ISSN:1021-7762    

DOI:10.1159/000266474

出版商:S. Karger AG    

年代:1997

数据来源: Karger

ISSN:1021-7762    

DOI:10.1159/000266475

出版商:S. Karger AG    

年代:1997

数据来源: Karger

ISSN:1021-7762    

DOI:10.1159/000266466

出版商:S. Karger AG    

年代:1997

数据来源: Karger