論文(共著)が Japanese Journal of Applied Physics に掲載されました。

水中音場の強度を計測するプローブに関する論文(共著)が Japanese Journal of Applied Physics に掲載されました。

X. Zeng, Y. Mizuno, and K. Nakamura, “Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements,” Jpn. J. Appl. Phys., vol. 56, no. 12, 127301 (2017).

The sound intensity vector provide useful information on the state of ultrasonic field in water, since sound intensity is vector quantity expressing the direction and magnitude of sound field. In the previous studies on sound intensity measurement in water, conventional piezoelectric sensors and metal cables were used, and the transmission distance was limited. A new configuration of a sound intensity probe suitable for ultrasonic measurement in water is proposed and constructed for trial in this study. The probe consist of light-emitting diodes and piezoelectric elements, and the output signals are transmitted through fiber optic cables as an intensity-modulated light. Sound intensity measurements of 26 kHz ultrasonic field in water are demonstrated. The difference in the intensity vector state between the water tank with and without sound absorbing material on its walls was successfully observed.