Description: date on which the product was completed by the manufacturer and is ready for sale; Name: Date of creation
Description: Date from which the production and / or development process is completed or from which a service is provided completely; Name: Date of manufacture
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