Question

Vibrations with frequencies above 20,000 Hz are called infrasonic vibrations.

• A. True
• B. False

Answer 1

The correct option is B False

1. Vibrations having frequencies above 20,000 Hz are called ultrasonic vibrations or ultrasonic frequencies.
2. Vibrations having frequencies lesser than 20 Hz are called infrasonic vibration or infrasonic frequencies.

Thus, this statement is false.