The audible range of frequencies for human being is-

Correct option is C

(c) 20 Hz to 20 kHz

Sol. The audible range for humans is 20 Hz to 20 kHz. Frequencies below 20 Hz are called infrasound, and those above 20 kHz are called ultrasound, which humans cannot hear.

Information Booster:

• Infrasound (<20 Hz) → Used in earthquake detection, animal communication.
• Ultrasound (>20 kHz) → Used in medical imaging (sonography), bats’ echolocation.
• Human ears are most sensitive to 1 kHz – 5 kHz.
• Dogs and cats can hear up to 40 kHz, dolphins up to 150 kHz.

Additional Information:

• (a) 2 Hz to 20 Hz → Incorrect, this range is infrasound.
• (b) 20 kHz to 200 kHz → Incorrect, this is mostly ultrasound.
• (d) 200 kHz to 300 kHz → Incorrect, used in SONAR and industrial applications.