Q: What do you call sound that has a wave frequency higher than the human ear can detect?


Read this paragraph and choose the correct option from the provided answers:

Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sounds with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz).

 Choices:

- dynamic sound

- supersonic sound

- hypersonic sound

- ultrasound


A:
ultrasound