Beam spread (approximation)
Ultrasonic beams spread as they propagate. A simple geometric model uses element size and wavelength to estimate the -6 dB beam boundary; this page uses a textbook-style approximation for quick classroom use.
Always refer to probe datasheets, Snell’s law at interfaces, and procedure limits for real inspections.
Approx. half-angle (deg): —
Disclaimer.
Results are indicative only. Verify against applicable standards and your employer’s procedures before use on safety-critical work.
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