The
paper contains discussion of problems of
evaluation of sound
absorption properties of building products.
The methods
evaluation of new sound absorption
parameters of building products acc. PN EN ISO 11654:1999 are presented and
their
practical usefulness are discused. The principles of determining the
required values of sound absorption for building materials in the process of
approval and certification are given. The results of sound absorption test
measurements performed in accordance with the EN 20354 at the Building Research
Institute (Poland) are compared with results obtained for the same type of
product in another European laboratory are presented.