State the SI unit in which the loudness of sound is measured.

State the relation between time period and frequency.

Name the characteristic property of sound through which we can differentiate between the sound of male and female.

Mention the range of audible sound for us.

Mention the reason behind the creation of noise.

We should plant trees along roadside. Explain why.

Explain in brief about hearing impairment.

A list of mediums is given below

(i) Wood (ii) Water (iii) Air (iv) Vacuum

In which of these mediums can sound travel?