Sound and Vibration Magazine - Information for subscriptions, and review of recent issues and events affecting noise and vibration control. Hearing Damage And Loud Music - Document on the relationship between loud noise and ear damage, with particular reference to young people and loud music. Vibrationdata.com - Consulting and educational services in: acoustics; shock and vibration; signal processing; and dynamic data acquisition and analysis. RDA Inc - Specializing in Sonar, research and development systems, anti-submarine warfare (ASW), and acoustics engineering. Acoustics FAQ - A Newsgroup FAQ document intended to answer frequently asked questions about acoustics. Particle Velocity Acoustical Sensors - Overview of the microflown technology to measure the entire range of acoustical properties like particle velocity, sound power and ( three dimensional ) sound intensity Introduction to Spectrum Analysis - Describes the procedure of conducting spectrum analysis and applications for this type of test. Page includes diagrams. Art Ludwig's Home Page - Information concerning acoustics. Arstech - Development, production and sales of systems in the fields of radar and sonar technology as well as consultancy work. Mechanical Acoustics/vibration Engineering Forum at Eng-tips - Engineering technical support forums and mutual help system for engineering professionals. Sound Around You Project - Large scale sonic research survey into the relationships of the public with the soundscapes they inhabit, being undertaken by the University of Salford, England