Waves/Sound Waves

Sound Waves
Sound is a longitudinal compression-expansion wave through matter. The wave speed is
 * $$c = ( \gamma R T_{abs} )^{1/2} $$ (2.11)

where $$\gamma$$ and $$R$$ are constants and $$T_{abs}$$ is the absolute temperature. The absolute temperature is measured in Kelvins and is numerically given by
 * $$T_{abs} = T_C + 273.16^{\circ} $$ (2.12)

where $$T_C$$ is the temperature in Celsius degrees. The angular frequency of sound waves is thus given by
 * $$ \omega = ck = ( \gamma R T_{abs} )^{1/2} k . $$ (2.13)

The speed of sound in air at normal temperatures is about $$340 \mbox{ m} \mbox{ s}^{-1}$$.