Formula wheel of acoustics audio sound pressure level fundamentals particle velocity characteristic specific acoustic impedance Z sound units intensity acoustic characteristic impedance dB SPL calculations pascal calculations sound units audio engineering sound recording formulas

The Formula Wheel − Formulas of Acoustics (Audio)

Fundamentals: Acoustic Laws and Sound Equations in Analogy (Relationship) to Ohm's Law. Formulary and Audio Equations

*Formula Wheel*	♥	*Important Formulas*
*of Acoustics and Audio*		*of Sound and Noise*
Acoustic Formulas Pie Chart

In acoustics and audio engineering sound pressure, air particle velocity, and acoustic impedance are
linear sound field strength quantities. The sound intensity is a quadratic sound energy strength quantity.

p = Z × v = J / v = √J × Z v = p / Z = J / p = √J / Z
Z = p / v = p² / J = J / v² J = p × v = Z × v² = p² / Z

Specific acoustic impedance Z₀ = ρ · c = p / v
ρ = density of air and c = speed of sound

Acoustics and vibrations − Acoustic equivalent for ohm's law
The Relation of sound quantities − Their levels and references − conversions
Relationship of acoustic quantities associated with a plane progressive acoustic sound wave

Electric current, electric power, electricity − Formulas and calculations
The formula wheel of electrical engineering

Decrease of the sound field with distance from the source

Pressure, velocity, and intensity of the sound field near to and
distant from a spherical radiator of the zeroth order

Inverse distance law p 1/r for sound pressure Inverse square law J 1/r² for acoustic intensity

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