Notes

Speed of Sound …

Speed of Sound is defined as the distance which a point on a wave, such as a compression or a rarefaction, travels per unit time. We know, Speed,
v = distance/time
Here λ is the wavelength of the sound wave. It is the distance travelled by the sound wave in one time period (T) of the wave. Thus,
v = vλ (∴ 1/T = v)
i.e.,
Speed = wavelength × frequency
The Speed of Sound remains almost the same for all frequencies in a given medium under the same physical conditions.