Description: indicates whether a component can be controlled or not ; Name: controllable 
Description: Provides information as to whether it is possible to continuously adapt the control variable to the reference variable of the control unit of the object; Name: Controllable
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