[" Sounds of frequency higher than "2OKHz" are "],[" called "]

Fill in the blanks with appropriate words and write the complete statements: Sound of frequency greater than 20kHz is called…….

The sounds of frequencies greater than 20 kHz are called ultrasonic sounds.

The sounds of frequency less than 20 Hz are known as

The sounds of frequency less than 20 Hz are known as

Sound waves with frequency greater than 20 kHz are called …………. .

Sound waves with frequency greater than 20 kHz are called……….. .

The sounds of frequencies greater than _____ are called ultrasonic sounds.