Question

Short Answer Questions Type-I (Answer in one or two sentences):
1. Differentiate between infrasonics and ultrasonics.​

Answer 1

Required Answer :

Infrasonics and ultrasonics are the types of sound. Difference between ultrasonic sound and infrasonic sound is :

Ultrasonic sound

• Ultrasonic sound are the sounds above 20,000 Hz.

• They are very high frequency sounds.

Infrasonic sound

• Infrasonic sounds are the sound below 20 Hz.

• They are very low frequency sounds.

Also, note that "Hz" is the SI unit of frequency.

● Frequency is the number of oscillations made by a vibrating object in one second. It is a characteristic of vibration.

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Know More!

→ Both infrasonic and ultrasonic sound can't be heard by humans.

→ Only some animals can hear ultrasonic sounds like dogs, monkey , cats .

→ Only some animals can hear infrasonic sounds like elephants , whales .

Importance of ultrasonic vibration :

Ultrasonic vibrations are used in many ways :

• They are used for making image of internal organs of human body.

• They are used to drive rats and cockroaches away from godowns.

• In some cases, doctors also use ultrasounds to break down the ‛stones’ in the kidneys of the patients into fine grains/pieces.