Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Zempo Keiichi and Wakatsuki Naoto and Mizutani Koichi,2E-2 Microphone Array with Variable Directional Characteristic Pattern based on Phase Difference Information(Measurement Techniques & Piezoelectric Devices),Proceedings of Symposium on Ultrasonic Electronics,1348-8236,Institute for Ultrasonic Elecronics,2010-12-06,31,0,281-282,https://cir.nii.ac.jp/crid/1390282763067753728,https://doi.org/10.24492/use.31.0_281