Question

Sound with frequencies in the range of $20Hz$ to $20kHz$ are called.

• A. audible sound
• B. inaudible sound
• C. ultrasonic sound

Answer 1

The correct option is A audible sound

The humans can easily detect the frequencies ranging between $20Hz$ to $20kHz$. Hence the sounds with in this range are known as audible sound. Sounds with frequencies below $20Hz$ are called as infrasonic and the sound with frequencies above $20kHz$ are called as ultrasonic sound.