As sound waves propagate from one place to another in air the air itself is not required to move from one place to othr
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when sound wave propagates ,d air particles themselves need not to displace because wat really travels is the energy .
Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attentuated by the medium. The purpose of this experiment is to examine what effect the characteristics of the medium have on sound.
All media have three properties which affect the behavior of sound propagation:
1. A relationship between density and pressure. This relationship, affected by temperature, determines the speed of sound within the medium.
2. The motion of the medium itself, e.g., wind. Independent of the motion of sound through the medium, if the medium is moving, the sound is further transported.
3. The viscosity of the medium. This determines the rate at which sound is attenuated. For many media, such as air or water, attenuation due to viscosity is negligible.
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