|Visual Representation of Sound Waveform |
(image courtsey: openclipart)
1. Sound travels from one point to another in the form of waves.
2. Sound is produced due to vibration of different objects.
3. Sound waves are longitudinal in nature.
4. Sound travels as a longitudinal wave through a material medium.
5. Sound travels as successive compressions and rarefactions in the medium.
6. In sound propagation, it is the energy of the sound that travels and not the particles of the medium.
7. Sound cannot travel in vacuum.
8. Sound waves cannot be polarised.
9. The change in density from one maximum value to the minimum value and again to the maximum value makes one complete oscillation.
10. The part or region of a longitudinal wave in which the density of the particles of the medium is higher than the normal density is known as compression.
11. The part or region of a longitudinal wave in which the density of the particles of the medium is lesser than the normal density is called a rarefaction.
12. The distance between two consecutive compressions or two consecutive rarefactions is called the wavelength, λ.