What is the normal frequency range of the human ear?

Correct answer: 20–20,000 Hz. Humans can normally hear sounds from about 20 Hz to 20,000 Hz.

Background: Sound frequency is measured in hertz (Hz). Young humans can normally hear from about 20 Hz to 20,000 Hz.

• 20–200 Hz: 20–200 Hz covers only very low sounds.
• 20–2000 Hz: 20–2000 Hz excludes higher sounds humans can hear.
• None of these: “None of these” is incorrect because 20–20,000 Hz is correct.

Did you know? Sound below 20 Hz is infrasound and above 20,000 Hz is ultrasound, which bats use to navigate.

Memory trick: 20 to 20,000 (20 Hz → 20 kHz).