Description: Integral of the product of the sound pressure p and the component of the particle velocity un, which is perpendicular to a surface at a point of this surface, over this surface; Name: Acoustic power
Description: determined 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
Description: indication of the minimum flow rate at which the pump can still be operated without problems. related to pump operation at 2,900 rpm; Name: minimum feed flow at 2900 / min