C37 Acoustics Dieter Ennemoser - Violin maker and acoustic researcher D.Ennemoser's C37-theory of natural sound, including applications on violins and loudspeakers. Wave Field Synthesis and Holophony - Provides information with animations on a wave field synthesis based holophony approach to reproducing the acoustics of the opera house in the living room. Prediction of Earthquakes - Paper by H.L.Dunegan on the use of high frequency sensors to detect acoustic emissions in order to predict earthquakes. 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. Scientific Applications and Research Associated, Inc - SARA specializes in harnessing electromagnetism, plasmas, acoustics and electronics to build practical applications for force protection, renewable energy, UAVs, small robotics and special test challenges. Sound Sucker: Acoustic Illusion - William Beaty describes an acoustic project with weird results. PureSpeakers - Discussions of loudspeaker plans and designs. Sealed, isobaric, ported, mtm, speaker, esotar, tweeter, woofer, midrange, speaker building Art Ludwig's Sound Page - Contains large amount of information about physical and room acoustics, design of loudspeakers. Sonic Architecture (TM) - Bill and Mary Buchen. Acoustical Porous Material Recipes - Glossary of terms, models and research methods. Waves - Provides computer animations of waves. Acoustics.org - Provides easy access to information in the broad field of acoustics. Provided by the Acoustical Society of America. 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.