EASY
Earn 100

Elephants use infrasonic sound to communicate across distances of several kilometres. Which other animals use sounds that are outside our range of hearing?

Important Questions on Waves and Sound

EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Which of the following animal produce ultrasound?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
How can we know from a distance that a car is approaching us?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
What is infrasound? Name some animals communicating through the infrasound.
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Name two animals which can hear sounds with frequency beyond 20000 Hz.
MEDIUM
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Explain how a bat catches its prey in the dark.
MEDIUM
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
A sound appears to be much louder inside a hall than in an open space. Give reasons.
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Which wave property determines the loudness of a sound?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Which of these use the ultrasound range?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing

Give reasons for the following:

We cannot hear any sound on vibrating our hands forward and backwards.

 

EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
How is loudness related to amplitude?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
How is loudness related to the distance between the listener and the source?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Which animal does not use the method of echolocation?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing

Rupesh was studying for his exams. His neighbour Berry was playing tabla. Rupesh was getting disturbed. He asked Berry to play tabla softly. Berry followed his advice. Why is soft sound produced when we strike a drum softly?

EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Name the sound waves used by bats while flying in the dark.
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Although sound is produced due to repeated vibratory motion yet a vibrating pendulum does not produce sound? Why?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
How is the loudness of a sound measured?
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
A large drum produces a louder sound than a small drum. Give reasons.
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
Sounds of frequencies below 20 Hz are called ____________ sound.
MEDIUM
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
The intensity of 60 dB sound corresponds to
EASY
Physical and Earth Science>Relationships>Waves and Sound>Range of Hearing
The loudness of sound is measured in terms of