Audible Range

Q.

Ultrasounds are low-frequency waves.

1. False

2. True

Q.

What is infrasonics ?

Q. We can hear sound of frequency_______.

1. 500 Hz
2. 50, 000 Hz
3. 10 Hz
4. 100, 000 Hz

Q. Are Ultrasonic and Infrasonic waves examples of sound waves?

Q. The frequency range of hearing in humans is 20 Hz to 20 kHz.

1. True
2. False

Q. To detect the obstacles in the path, bats produce ultrasonic sound waves.

1. True
2. False

Q. Ultrasound is not used __________.

1. by elephants to communicate over long distances
2. to find the distance of an object
3. as a tool in the treatment of muscular pain
4. to clean spiral tubes

Q.

difference between ultrasonic and infrasonic?