Which range of frequencies can a healthy human ear detect?

1. The ear does not respond to every frequency of pressure wave. 2. Frequencies from 20 to 20 000 hertz are audible to the human ear. 3. Below that band the sound is called infrasound and cannot be heard. 4. Above that band the sound is called ultrasound, which some animals hear but people do not. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 10: Sound_