Description: the durability describes how well the object fulfills the required function up to the end of its useful life; Name: long-lastingness
Description: Ability of an item to perform a required function under given conditions of use and maintenance, until the end of useful life ; Name: Durability
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