Description: free cross-section of the inlet opening in the inlet nozzle of the pump; Name: Inlet cross section of the pump
Description: free cross-sectional area of the entry opening in the inlet connection of the pump; Name: inlet area of the pump
Description: through a surface, product of the sound pressure, p, and the component of the particle velocity, un, at a point on the surface in the direction normal to the surface, integrated over that surface; Name: sound power