Gavreau's Infrasound Weapons - Dr. Gavreau and his staff made a observation which, not only interrupted their work, but became their major research theme. They periodically experienced a disconcerting nausea which flooded the research facility. Low frequency sound (7 Hz) could resonate - http://www.borderlands.com/archives/arch/gavreaus.htm
Sara - wave creation, propagation, reception and understanding are at the core of our business. Sound at frequencies below that which can be - http://www.sara.com/
In-Flight Rotorcraft Acoustics Program (IRAP) - NASA's aeronautics research will reduce noise to make helicopters and tiltrotors more acceptable to the public. The objective of IRAP is to acquire rotorcraft noise data in flight for comparison to wind tunnel data. - http://halfdome.arc.nasa.gov/research/IRAP-intro.html
C37 Acoustics Dieter Ennemoser - Violinmaker and aoustic researcher D.Ennemoser's C37-theory of natural sound, including applications on violins and loudpeakers. - http://www.ennemoser.com
Modal Analysis and Structural Fatigue - Solutions using computer modelling to determine the vibration modes and impact on a building, equipment or mechanical component when exposed to a vibration source. - http://www.modalanalysis.com