Waves/Sound Waves

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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 $340 \mbox{ m} \mbox{ s}^{-1}$ .

Waves : 1 Dimensional Waves
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