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7 results for “sound”

Formulae (7)

f' = f\frac{v \pm v_o}{v \mp v_s}

Observed frequency shift due to relative motion.

f' = f\frac{v \pm v_o}{v \mp v_s}

Observed frequency shift from relative motion.

\beta = 10\log_{10}\frac{I}{I_0}

Loudness in decibels relative to threshold.

M = \dfrac{v}{a}

Ratio of true airspeed to the local speed of sound.

a = 38.94\sqrt{T}

Local speed of sound (kt) as a function of absolute air temperature (Kelvin).

M = \frac{v}{a}

Ratio of speed to the local speed of sound.

L = 10\log_{10}\frac{I}{I_0}

Sound intensity level in decibels.