Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. scientific concepts
5. physical sciences concepts
6. physics concepts
7. acoustics concepts

Narrower term/s

• ultrasound

Anotations

Scope note:

Mechanical disturbance from a state of equilibrium that propagates energy through air, water, or another elastic medium. It is responsible for the sensation of hearing, although it also includes energy waves that cannot be heard by the human ear but can be detected by sonar equipment and other devices.