Hypersonic Sound

HyperSonic Sound What, How? questions about
Complex Signal Processing using Non-Linear Auditory Frequency Selectivity
Tim Bigelow: Experimental Evaluation Of Nonlinear Indices For Ultrasound Transducer Characterizations", Master's Thesis, University of Illinois at Urbana-Champaign, 2001.
Woody Norris has a way of getting inside your head
Psychological Attributes of Sound
Silicon Micromachined Microphones
The Sound of Things to Come
Cutting Edge Technology to Send Sound Where it Belongs
Sonic Bullets to Be Acoustic Weapon of the Future