Question

Match the following range of frequencies with their sounds.

• A. Infrasound
• B. Audible sound
• C. Ultrasound

Answer 1

The audible range of frequency for an average human ear is $20Hz-20000Hz$.
The sound waves of frequencies above $20000Hz$ are called ultrasound and below $20Hz$ are called as infrasound, these ranges are inaudible to the human ear.