 ## 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

### Frequency

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.

### Time

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

### Velocity

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.

### Amplitude

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.

### Density

Refers to the density of the building part in question.

### Thickness

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.

### Formula

Frequency:   