两种超鼻音声学测量方法的比较研究。

A comparative study of two acoustic measures of hypernasality.

机构信息

University of Melbourne, Centre for Neuroscience, 7/21 Victoria Street, Melbourne, Victoria 3000, Australia.

出版信息

J Speech Lang Hear Res. 2009 Dec;52(6):1640-51. doi: 10.1044/1092-4388(2009/08-0161).

DOI:10.1044/1092-4388(2009/08-0161)

PMID:19951929

Abstract

PURPOSE

This study aimed to compare 2 quantitative acoustic measures of nasality in children with cleft lip and palate (CLP) and healthy controls using formalized perceptual assessment as a guide.

METHOD

Fifty participants (23 children with CLP and 27 age- and gender-matched healthy controls) aged between 4 and 12 years produced a variety of high and low vowels that allowed perceptual ratings of nasal resonance severity as well as acoustic analysis of spectral changes. Two objective measures of nasality were used: 1/3 octave spectra analysis and the voice low tone high tone ratio. Each respective technique has been evaluated in previous research, and their potential as an effective means of detecting changes in nasal resonance has been demonstrated.

RESULTS

Only 1/3 octave spectra analysis differentiated between participants with hypernasal speech and those perceived to have normal nasal resonance. Significant differences were also observed between varying levels of perceived severity on vowels within nonnasalized phonemic environments (/pIt/, /tIp/).

CONCLUSIONS

Perceptual judgment remains the primary means of evaluating levels of nasality in children with CLP. However, the development and validation of easy-to-use objective techniques remains an important goal for effective clinical and empirical practice.

摘要

目的

本研究旨在通过规范化的感知评估，比较腭裂儿童与健康对照组的 2 种鼻音的定量声学测量值。

方法

50 名参与者（23 名腭裂儿童和 27 名年龄和性别匹配的健康对照组）年龄在 4 至 12 岁之间，他们发出各种高音和低音元音，以便对鼻音共振严重程度进行感知评估，并对频谱变化进行声学分析。使用了 2 种鼻音的客观测量方法：1/3 倍频程频谱分析和嗓音低音高音比。这两种技术在之前的研究中都得到了评估，并且已经证明它们具有检测鼻音共振变化的潜力。