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 Session 4Chair: Yasunori Nakamura (Aichi-Gakuin University )




Comparison of the swallowing mensuration using MI sensor with swallowing soundusing the pharynx microphone–


K. Hamaguchi 1 , M. Akutagawa 2, Y. Tegawa 3, T. Ichikawa 3, S.Hongama 3,Y. Kinouchi 2

1:Graduate School of Advanced Technology and Science, The Univ. of Tokushima

2:Institute of Technology and Science ,The Univ. of Tokushima

3:Institute of Health Biosciences ,The Univ. of Tokushima


The repetitive saliva swallowing test (RSST) is one of the effective screening methods. In this study, we developed anexperimental screening device to automate the RSST using a MI sensor. The movement of magnet, which movement of larynx according to swallowing, was detected with the MI sensor as a change in the magnetic field.

Although this method has the advantage of measuring the movement of the larynx during swallowing, depending on the conditions at the time of measurement, such as body movement and accidental swallowing that was difficult to detect the swallowing behavior.

In this study, we used a video camera and a pharynx microphone at the same time of the measurement, and acquired movement of the laryngeal part and a swallowing sound at the time of the swallowing and compared it.

The results presented in this paper indicate that the timing of swallowing measured by the MI sensor and timing of the swallowing sound was the same. But at present stage, there are many points which are uncertain. A motion of the magnet on the surface of the skin is the subject for a future study.



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