[IEEE Technical Digest. IEEE International MEMS 99 Conference. Twelfth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.99CH36291) - Orlando, FL, USA (1999.01.21-1999.01.21)] Technical Digest. IEEE International MEMS 99 Conference. Twelfth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.99CH36291) - Three-dimensional sound intensity measurements using Microflown particle velocity sensors