Norsonic Nor1517A Airflow Resistance Measurement System

Airflow resistance is a crucial parameter for porous materials.

Nor1517A measures the specific airflow resistance – and related quantities – by the applying the alternating airflow method according to ISO 9053-2:2020 Acoustics – Determination of airflow resistance – Part 2: Alternating airflow method.

The Nor1517A system is based on the dynamic principle. An a.c. motor-driven piston produces an alternating air-flow at a frequency of 2Hz into a cylindrical coupler and through the test material. The pressure modulation inside the coupler is measured by a condenser microphone connected to a Nor 140 sound analyser. The modulation is measured using the 2Hz third octave band.

The specific airflow resistivity is indicated on the meter directectly in Pa s/m. The measurement results can also be stored in the instrument memory.