Acoustics

=Concepts=

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 * 1) **__Speed__:** is distance travelled per unit time.
 * 2) __**Frequency:**__ is a quantity that measures the number of repetitions per unit time of any phenomenon or event periodic.
 * 3) **__ Wavelength: __** is the distance between identical points on adjacentcycles of a waveform signal spread in space.
 * 4) **__Longitudina__**l: is a wave in which the oscillating motion of the particles of the medium is parallel to the direction of wave propagation.
 * 5) __**Transverse:**__ is a traveling wave that is characterized by its oscillations occur perpendicular to the direction of propagation.