» Cavitation energy meter (ppb, Inc.)    Meters energy and frequency in ultrasonic and megasonic cleaning tanks used in the semiconductor, wafer, disk drive, flat-panel display, electronics and parts precision cleaning industries.    http://www.megasonics.com/

» Parametric Difference Waves for Low Frequency Acoustic Propagation    Unclassified/commercial mind control technology.    http://www.raven1.net/uncom.htm#AERIA

» Sound velocity sensor AQSV-1500    AQUAMATIC, Denmark    http://www.aquamatic.dk/AQSV1.htm

» Thin Film Ultrasonic Transducer for Accurate Control of Fastener Clamp Load    NASA (USA)    http://sbir.gsfc.nasa.gov/SBIR/successes/ss/089text.html

» Ultrasonic Blaster    sonic shockwaves    http://www.amazing1.com/ultra.htm

» Ultrasonic Translator SK-207 (Transtronic)    Electronic kit. Hear car brakes, gas leaks or even bats.    http://www.xtronics.com/Kits/SK-207.htm

» Ultrasonic/Contact Stethoscope    The 2047U/C combines the features of a standard electronic stethoscope - with those of an ultrasonic (sounds higher in frequency than the ear can hear) detector.    http://www.tscm.com/mlk2047.html