An attempt to improve the clinical usefulness of phonetograms  

Oleh:

Gramming P.H. ; GAUFFIN, J. ; Sundberg, J.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Phonetics vol. 14 no. 3/4 (Dec. 1986), page 421 - 428.

Ketersediaan

Perpustakaan PKBB Nomor Panggil: 405/JOP/14 Non-tandon: tidak ada Tandon: 1

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Isi artikel

Phonetograms, i.e. graphs showing SPL versus fundamental frequency of voice in soft and loud phonation, have frequently been used in voice clinics as an aid for describing voice function. However, a phonetogram does not offer an exhaustive picture about the voice status. For instance, the same SPL value can be obtained using different modes of phonation. This suggests the need for complementing phonetograms with some information reflecting mode of phonation. In previous research it has been demonstrated that the amplitude of the fundamental may vary within wide limits depending on the mode of phonation. This pilot study presents an attempt to explore the information offered by the amplitude of the fundamental (La).The variations in La related to changes of phonatory conditions are mapped and typical patterns are revealed. Two patients suffering from phonastenic dysphonia strained their voices by 30 min of loud reading. Phonetograms displayed increased SPL values in loud phonation after loud reading but essentially unchanged SPL values in soft phonation, thus suggesting improvement of voice dynamics. However, after loud reading the patients also showed a trend to a smaller range of La variation, which suggest a change towards a pressed/strained/tense mode of phonation.

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