Multiple choice

The range of audible frequencies for a normal human ear is

  1. 20 Hz to 20,000 Hz

  2. 20,000 Hz to 40,000 Hz

  3. 20 Hz to 2000 Hz

  4. none of these

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A Correct answer
Explanation

The normal human ear can detect frequencies from 20 Hz (low bass) to 20,000 Hz (high treble). This range decreases with age and exposure to loud sounds. Frequencies below 20 Hz are infrasound, while above 20,000 Hz are ultrasound - both inaudible to humans.