The Online Journal of Nondestructive Testing & Ultrasonics - Journal, search engine and lexicon. Ultrasonic Drilling Homepage - JPL's NDEAA (NASA) Ultrasonic C-Scan History - UXR Transducer Beam Characteristics - Bioacoustics Research Lab at the University of Illinois at Urbana-Champaign. Ultrasonic Flowmeters - How ultrasonic transit time flowmeters work (by Eesiflo) Schlierent Visualization of Ultrasound - Video sequences from Cambridge Ultrasonics. Principles of Computerized Tomographic Imaging - Code samples and general information. Acoustic Saturation - The maximum value of acoustic pressure within an ultrasonic beam is limited by acoustic saturation. (Bioacoustic Research Lab.) Ultrasonic Cleaning - Jeff Hancock (Blue Wave Ultrasonics) Swath Sonar Sites - Available through the Ocean Mapping Group. Chris Cheers' Power Ultrasonics Web Site - Independent guide to high power ultrasonics - with a database of industrial suppliers and descriptions of equipment and processes including ultrasonic plastic welding, ultrasonic metal welding, ultrasonic cleaning and sonochemistry. Acoustic Microscopy - Scanning Acoustic Microscopy (SAM) is a non-destructive failure analysis or inspection technique. SAM can be performed with either the Scanning Laser Acoustic Microscope (SLAM) or the C-Mode SAM (C-SAM). (University of Maryland) A Small Introduction into Scanning Acoustic Microscopy - University of Wuppertal (Germany). Piezocomposite Technology - Imasonic has developed specialised knowledge and several technological processes based on the concept of piezoelectric composites with a ceramic polymer structure known as the 1-3 piezo-composite structure. Lowrance Electronics: Sonar Tutorial - Provides an explanation on how sonar works with particular reference to locating fish. Synthetic Aperture Imaging - Bioacoustics Research Lab at the University of Illinois at Urbana-Champaign.