Question

The graph shows the range of frequencies commonly heard by some animals.

A graph with frequency in Hertz on the axis from 0 to 100, 000. On the y axis are porpoise, bat, moth, cat, human, bird, fish, cricket and snake. Porpoise is 60 to 105,000 Hertz. Bat is 55 to 100,000 Hertz. Moth is 250 to 100,000 Hertz. Cat is 60 to 80, 000 Hertz. Human is 20 to 12,000 Hertz. Bird is 65 to 9000 Hertz. Fish is 80 to 2000 Hertz. Cricket is 55 to 1,000 Hertz. Lastly snake is 100 to 1000 Hertz.
Which animals can hear a sound wave that has 18,500 cycles in 0.75 seconds? Check all that apply.

bats
moths
cats
humans
birds
fish
crickets

Answer 1

Frequency = 18,500 / 0.75 = 24,666.7 Hz (≈ 24.7 kHz).

Which ranges include ~24,667 Hz:
- Bats: yes (55–100,000 Hz)
- Moths: yes (250–100,000 Hz)
- Cats: yes (60–80,000 Hz)

Humans, birds, fish, and crickets cannot hear that high.