Description: Ability of an object, under given conditions and when required to be in a state, to perform a required function; Name: avbl
Description: Probability that a machine will, when used under specified conditions, operate satisfactorily and effectively; Name: Availability
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