Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 01, 2022 - June 04, 2022
We propose a metal mesh structure as an electromagnetic shield for an airborne ultrasound tactile display (AUTD) which manages both low electromagnetic emission for fMRI-compatibility and ultra-sound transmission. Focusing on designing of the mesh pitch, aperture rate, and number of sheet, we verified both electromagnetic shielding effect and sound intensity attenuation rate by numerical simulation. Also by measuring the magnetic field radiation from the AUTD and comparing it with the reference value of the previous research, it was confirmed that 70 dB atttenuation is required for shielding. Comparing these result, we found that the most appropriate shielding structure of the mesh has three layers, 0.9 in aperture rate, and less than 0.2 in rate of pitch to wave length. The simulation result can be also applied in electromagnetic shield for other devices having compatibility of low intensity of electromagnetic wave with sound transmission.
