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KMID : 0384019950060010046
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Journal of the Korean Society of Logopedics and Phoniatrics
1995 Volume.6 No. 1 p.46 ~ p.55
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Development of Objective Nasometer Using a Vibratory Sensor and its Clinical Application
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Abstract
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Authors devised an objective test for nasal resonatory disorders using a vibratory sensor(Piezoelectric receiver) which is relatively cheap. The vibratory sensor was covered with is attached on alanasi during the test
Electrical signals from the vibratory sensor and the microphone while the subject is phonating vowel /a/ and nasal consonant /ng/ and phonating 8 syllable sentence /papa/ passage and /mama/ passage were digitized with a 12 bit A/D converter. For
the
evaluation of the hypernasality. The ratio of /ng/ to/a/ and/mama/passage to/papa/ passage were used instead of individual values to reduce the observational error. For the evaluation of the hyponasality, the cul-de-sac resonation was induced by
obstructing the nasal aperture of the ipsilateral side with the finger.
In the normal control group, the ratio of/ng/to/g/ and/mama/passage to/papa/ passage was larger than 8. In the hypernasality with nasal emission group. the control group and hypernaslity group (p<0.01). However. In the hyponasality group(severe),
the
increment was minimal.
So this system can be used to detect the nasal resonatory disorders objectively and differentiated the hypernasality from easily.
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KEYWORD
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