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The audible frequency range for humans is:
- 20 Hz - 20 kHz
- 20 kHz - 20 MHz
- 1 Hz - 100 Hz
- 100 kHz - 1 MHz
Answer: 20 Hz - 20 kHz
Humans hear 20 Hz (bass) to 20,000 Hz (treble). Ultrasonic (>20 kHz) used in medical imaging; infrasonic (<20 Hz) from earthquakes. Important for acoustics. [[NCERT Physics Class 9]]