The intensity of sound of jet engine … dB.

The intensity of sound of a fire cracker is … dB.

The intensity of near total silence is … dB.

Why does a cracker make a loud sound?

High intensity sounds causes

Raju cannot hear this sounds with

Which of the sound is not harmful?

How do you control sound pollution ?

Audible frequency range

Find the odd one out from the parts of speech organs.

A bird makes high pitch sound and a lion makes low pitch roar. Predict the reason.

A blade made 3000 vibrations in 10 seconds. Then the frequency of the blade is … vibr. / sec.

The loudness of sound exceeds … are harmful for the ear.

Apparatus required in an experiment to find the relation between intensity of sound and amplitude.

Laahi is asked to conduct an experiment by giving bucket, water and two stones. After doing the experiment what is her observation?