Per V. Bruel
Bruel Acoust. ApS, Gl. Holtevej 97, Denmark
Throughout the world there has been a desire to test mineral wool for the shredding of mineral fibers. There is a general concern, that sound absorption materials, consisting of fibers made of rock or glass, are damaging even in small amounts. Until now a standard method for the testing of acoustical absorbers has not been found. This paper shows a test chamber and describes a method for the objective measurement of shredded fibers. This method is simple and fast to carry out and shows a level of accuracy, which seems better than earlier attempts.