Visual analysis of spectrographic parameters before and after dysphonia therapy

Revista da Sociedade Brasileira de Fonoaudiologia

Gama, Ana Cristina Côrtes¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Côrtes, Marcela Guimarães¹ 

关键词: Dysphonia/diagnosis;    Voice;    Voice disorders/rehabilitation;    Speech acoustics;    Sound spectrography;    Speech therapy;   

DOI  :  10.1590/S1516-80342010000200016

来源: Sociedade Brasileira de Fonoaudiologia

【 摘 要 】

PURPOSE: To evaluate the effects of vocal therapy on voice disorders using different spectrographic parameters, before and after therapy.METHODS: This experimental retrospective study analyzed voice recordings of 67 dysphonic patients that had attended vocal therapy. Pre- and post-treatment spectrograms were analyzed by four speech-language pathologists. The following parameters were analyzed: spectrogram regularity, harmonic colors, spectrogram stability, presence of noise components, presence of harmonic and sub-harmonics. Data were submitted to statistical analysis, which aimed at identifying different patterns between genders and diagnoses. RESULTS: There was no difference between pre and post-therapy conditions for spectrogram regularity, however, most patients (58%) showed improvement. Harmonic colors remained stable (p=0.000). Significant improvement was observed, after voice therapy, regarding spectrogram stability (p=0.006), and presence of noise (p=0.007), harmonics (p=0.000) and sub-harmonics components (p=0.001). No relation was found between patient's gender and spectrographic improvement. Regarding diagnoses, differences caused by therapy were only significant for spectrogram regularity.CONCLUSIONS: Not all evaluated parameters showed significant improvements with therapy, however, acoustic spectrography proved to be an efficient tool to evaluate patients' progresses during vocal rehabilitation, complementing auditory-perceptual evaluation and composing a multidimensional assessment protocol.

【 授权许可】

Unknown