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Calculates the sound frequency depending on the time interval and the critical frequency.

Frequency alternative 1

Input Result
Frequency f= Hz Hz
Time t= s s

Frequency alternative 2

Input Result
Frequency f= Hz Hz
Velocity c=
Wave length λ=

Critical frequency

Input Result
Propagation speed c=
Density ρ=
Thickness ρ=
Modulus of elasticity E= N/m2
Poisson's ratio μ=
Critical frequency fc= Hz



The frequency is period the velocity of a sound wave that is the number of oscillations per second the wave does. Frequency is measured in Hertz (Hz) which is a unit which is derived from the SI system and corresponds to one cycle per second.


The time that passes during a period that is a wave length.


With what hasitghet a wave moving at this velocity varies greatly depending on the material the wave travels. Could also be called also the velocity of propagation.


The amplitude describes the maximum deviation from the equilibrium state, ie the wave height of the oscillation.

Wave length

The wave length is the distance a wave front moves during a period.

Propagation speed

Hastigheten av longitudinalvågens utbredning i luft.

Poisson's ratio

Is a constant that indicates how the meter reacts to compressive and tractive forces.


Refers to the density of the building part in question.


Refers to the thickness of the building part in question.

Modulus of elasticity

The modulus of elasticity is a material-dependent variable that shows the relationship between mechanical stress and deformation. Also goes by the name Young's module.

Critical frequency

At what frequency the building component in question creates resonance.


Frequency: Frequency
Frequency: Frequency
Critical frequency: Kritiskfrekvens