Glossary of ultrasonic terms

"Words are the pegs on which we hang our ideas." (unknown author)

These definitions are specifically directed toward the design of ultrasonic resonators. Because ease of understanding is paramount, some definitions may be limited or may not be completely rigorous.

For ease of use, some terms may be listed twice, once as an individual term and again as part of a category list. For example, "Exponential horn" is listed under -E- and also under the "Horn" category.

Unless otherwise noted, the following are assumed for all topics —

• All resonances are axial.
• All resonators are half-wave.
• All materials are isotropic and homogeneous.