Infrasonic, Ultrasonic Sounds and Human Ear

Sound is produced by:

• noises

• vibrations

• tremors

• waves

 What sounds do dolphins, bats and porpoise use?

• ultrasonic

• infrasonic

• sonic

• none of these

Children under the age of 5 can hear upto

• 25 Hz

• 25 kHz

• 20 Hz

• 50 kHz

Which of the following can hear infrasonic sounds?

• dog

• bat

• rhinoceros

• humans

What is the complete audible range for a human ear?

• 20 to 25,000 Hz

• 30 to 30,000 Hz

• 20 to 2,000 Hz

• 20 to 20,000 Hz

Which of the following produces infrasonic sound?

• camels

• dolphins

• elephants

• bats

What is used to break small stones formed in the kidneys?

• infrasound

• ultrasound

• infrared

• ultraviolet

In SONAR we use

• ultrasonic waves

• infrasonic waves

• radio waves

• audible sound waves

What is the full form of SONAR?

• Sound Navigation and Range

• Sound Navigation and Ranging

• Sound Navigate and Ranging

• Sound Navigate and Ranger

What type of waves are generated by SONAR device fixed to a fishing ship?

• sound waves

• water waves

• radio waves

• infrared waves