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Ultrasound can help doctors look inside a patient's body to see everything from heart valves to a moving baby! Learn how ultrasound works!
www.howstuffworks.com/ultrasound.htm
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NDT.net - September 2000, Vol. 5 No. 09 Nondestructive Material Testing with Ultrasonics - Introduction to the Basic Principles - Michael Berke TABLE OF CONTENTS Introduction 1. Why use ultrasonics for nondestructive material testing 2. Ultrasonic testing tasks 3. Detection of discontinuities 4. Method of testing and instrument technology 4.1 The ultrasonic flaw detector 4.2 Near resolution 4.3 ...
www.ndt.net/article/v05n09/berke/berke1.htm
Acoustic Cavitation and Nonlinear Dynamics If you focus ultrasonic waves into water, tiny bubbles will be produced, forming a fractal structure and radiating sound by themselves. This is a cavitation field being produced by a radially symmetric sound field of approximately 23 kHz. Above you see an image of a strange attractor from acoustic cavitation noise. It is constructed from a time series ...
www.physik.tu-darmstadt.de/nlp/cavitation.html