Published
This document specifies an alternating airflow method for the determination of the airflow resistance[5], [6] of porous materials for acoustical applications.
Determination of the airflow resistance based on static flow is described in ISO 9053‑1.
                    PUBLISHED
                    SRPS EN ISO 9053-2:2021
                    60.60
                                        Standard published
                    May 31, 2021