The following table or figure may be downloaded to PowerPoint for personal use in teaching and presentations. This feature is available to all subscribers to the journal.

You MUST read and follow the guidelines at Request to Reproduce AJR Content if you are distributing or using AJR content beyond academic use (limited distribution, non-revenue producing, or educational purposes).

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)

Fig. 1. —Drawing of undistorted pressure wave (top) and of pressure wave after undergoing nonlinear propagation (bottom). Nonlinear effects cause high-pressure regions of sound wave to travel faster than low-pressure regions and result in progressive distortion of transmitted wave with generation of sound at higher harmonics of transmit frequency.