Heath-consultants Aqua-Scop Instrukcja Użytkownika Pobierz pdf (Strona 18)

The Transmission Velocity of Sound in an extended solid is given by:

VELOCITY Longitudinal =

Where: EB = The Bulk Modulus (Rigidity) of the Solid

ES = The Shear Modulus (Resistance to Deformation) of the

Solid

ρ = Density

In the case of a transverse wave in an extended solid, the Velocity is

determined by the Shear Modulus alone and is expressed as:

VELOCITY Transverse =

If we now divide the Longitudinal Velocity by the Transverse Velocity in

an extended solid, we note that:

Or that the Longitudinal Velocity always exceeds the Transverse

Velocity. This fact is used in Seismology to determine the point or origin

of earthquakes.

Since a uid cannot sustain a shear (ES = O), no Transverse Wave can be

transmitted in a uid and the Longitudinal Velocity is given by:

Where: EB is the Adiabatic Bulk Modulus.

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Heath-consultants Aqua-Scop Instrukcja Użytkownika Strona 18