Question

why sound waves are called mechanical waves? ​

Answer 1

Answer:

Sound waves are mechanical waves because they need a material medium for propagation, like air or liquids like water, or metals like silver.

Explanation:

Answer 2

Answer:

They are mechanical since they require a medium to travel.

For example, in vacuum(like in outer space), astronauts use radio to communicate and they cannot shout or talk since sound would not travel in vacuum.