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KMID : 1036820140190040558
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Communication Sciences & Disorders
2014 Volume.19 No. 4 p.558 ~ p.563
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The Difference in Alternating Motion Rate Tests between the Same Speaker’s Normal and Whispered Speech
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Pyo Hwa-Young
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Abstract
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Objectives: Alternating motion rate (AMR) tests are usually used to investigate the mobility and function of articulators but it is controversial if AMR tests can predict articulatory skill reliably. The present study was performed to compare AMR test results when speakers produce normal and whispered speech which show different aerodynamic characteristics and to consider the reliability and practicality of the AMR method.
Methods: 39 females (age of 18-23 years) who have no communication disorders performed AMR tests with normal and whispered speech. To confirm the aerodynamic difference between the two speech styles, mean expiratory airflow (MEA) and maximum phonation time (MPT) were measured.
Results: Aerodynamic analysis showed that in whispered speech MEA was significantly higher and MPT was shorter. Among the three /ph?/, /th?/, and /kh?/ syllables, the repetition rate of /th?/ was highest, and /kh?/ was lowest. /ph?/ and /th?/ repetition rates were significantly lower in whispered speech, but /kh?/ repetition rate was not significantly different between the two speech styles.
Conclusion: Even with the same articulatory structures and mobility, if aerodynamic characteristics are different, AMR test results can be significantly different. So, to predict a speaker?s articulation skills reliably by AMR tests, it is also necessary to take into account the speaker?s aerodynamic characteristics.
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KEYWORD
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Normal speech, Whispered speech, AMR, Aerodynamics
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