Ultrasound

Summary: Table 2 shows that bats, dogs, and goldfish all have completely different audible ranges to humans. Lots of animals can hear frequencies that are much higher than the frequencies we can hear. - Frequencies below 20 Hz are called infrasound. - Frequencies above 20 000 Hz are called ultrasound. Tags: science student-book-7 physics Created: 2026-05-21 Last Updated: 2026-05-21

Ultrasound

Table 2 shows that bats, dogs, and goldfish all have completely different audible ranges to humans. Lots of animals can hear frequencies that are much higher than the frequencies we can hear. - Frequencies below 20 Hz are called infrasound. - Frequencies above 20 000 Hz are called ultrasound.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Physics/Sound/2.4 Detecting sound.md), Physics section.