Question

Is ultrasound a mechanical wave or an electromagnetic wave?

Answer 1

1. In contrast to mechanical waves, electromagnetic waves can travel without a medium.
2. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.
3. Ultrasounds are sound waves with frequencies greater than the top audible range of human hearing.
4. The upper limit is roughly $20,000Hertz$, though it differs from person to person.
5. Ultrasound shares many of the same physical characteristics as regular sound.
6. Sound waves with a frequency above $20,000Hertz$ are referred to as ultrasounds.
7. A mechanical wave is an ultrasound.
8. It needs a physical medium to spread.

Hence, ultrasound is a mechanical wave.