Question

write down the basic cause of production of sound and describe how sound is propagated in air??

Answer 1

Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.) around it to vibrate. Vibrations in air are called traveling longitudinal waves, which we can hear. Sound waves consist of areas of high and low pressure called compressions and rarefactions, respectively.

Sound Propagation. Sound propagatesthrough air as a longitudinal wave. The speed of sound is determined by the properties of the air, and not by the frequency or amplitude of the sound.Sound waves, as well as most other types of waves, can be described in terms of the following basic wave phenomena.

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Answer 2

Sound is a form of energy which causes sensation of hearing .Sound is produced by vibrating bodies .When a bell is struck with a metallic rod,it produces sound .We can sense the vibration of the bell while it is producing sound by touching it.We can even observe that the sound ceases when the bell stops vibrating.Sound propagates in the form of mechanical waves. So it requires a material medium to propagate from one place to another.Sound can propagate through solids,liquids and also through gases.When an earthquake occurs,the shock waves produced at the point where the earthquake occurred travel in all possible direction.They travel through layers of the earth which consist of solid rock materials as well as liquid water bodies.On reaching the surface of the earth these sound waves travel through air and reach our ears and product the sensation of hearing. Thus sound wave travels through solid ,liquid and gases too.