A magnetic resonance imaging study on the articulatory and acoustic speech parameters of Malay vowels
| Autor: | Mehmet Bilgen, Seyed Mostafa Mirhassani, Alireza Zourmand, Shaik Ismail Bux, Kwan Hoong Ng, Mohd Amin Jalaludin, Hua Nong Ting |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Speech production Speech recognition Movement Biomedical Engineering Vocal tract shape Image processing Biomaterials Acoustic theory Tongue Acoustic parameters Articulators’ movements medicine Image Processing Computer-Assisted Humans Speech Malay vowel sounds Radiology Nuclear Medicine and imaging Active contour model Radiological and Ultrasound Technology Research General Medicine Acoustics Manner of articulation Magnetic Resonance Imaging medicine.anatomical_structure Formant Indonesia Formant frequencies Female Active contour Psychology Vocal tract |
| Zdroj: | BioMedical Engineering |
| ISSN: | 1475-925X |
| Popis: | The phonetic properties of six Malay vowels are investigated using magnetic resonance imaging (MRI) to visualize the vocal tract in order to obtain dynamic articulatory parameters during speech production. To resolve image blurring due to the tongue movement during the scanning process, a method based on active contour extraction is used to track tongue contours. The proposed method efficiently tracks tongue contours despite the partial blurring of MRI images. Consequently, the articulatory parameters that are effectively measured as tongue movement is observed, and the specific shape of the tongue and its position for all six uttered Malay vowels are determined. Speech rehabilitation procedure demands some kind of visual perceivable prototype of speech articulation. To investigate the validity of the measured articulatory parameters based on acoustic theory of speech production, an acoustic analysis based on the uttered vowels by subjects has been performed. As the acoustic speech and articulatory parameters of uttered speech were examined, a correlation between formant frequencies and articulatory parameters was observed. The experiments reported a positive correlation between the constriction location of the tongue body and the first formant frequency, as well as a negative correlation between the constriction location of the tongue tip and the second formant frequency. The results demonstrate that the proposed method is an effective tool for the dynamic study of speech production. |
| Databáze: | OpenAIRE |
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