The quantity airflow resistance is one of the most important parameters for the description of porous materials with strong links to its acoustic properties. A low value for the airflow resistance indicates little resistance for air streaming through the material and a high value indicates that the material is closer to air-tight.
Nor1517A measures the specific airflow resistance – and related quantities – by the applying the alternating airflow method according to ISO 9053-2:2020 Acoustics – Determinations of airflow resistance – Part 2: Alternating airflow method.
The Nor1517A system is based on the dynamic principle. An AC motor driven piston produces a oscillating movement causing an alternating air-flow of frequency 2Hz into a cylindrical tank and through the test material. The pressure modulation inside the cylinder is measured by a condenser microphone connected to a sound analyser using the 2Hz 1/3 octave band on the sound level meter Nor140. The specific airflow resistivity results are calculated in an Excel spreadsheet or alternatively read from the meter directly in Pa s/m The measurement results may also be stored in the instrument memory for further use/documentation.
Measure the specific airflow resistance in Pa s m-1 according to ISO 9053-2 (2020): Acoustics – Determination of airflow resistance – Part 2: Alternating airflow method. Related quantities as airflow resistance and airflow resistivity may also be measured.
Measurement range: 10 Pa s m-1 to 30 000 Pa s m-1, up to 100 000 Pa s m-1 when correcting for non-linearities.
Airflow speed: 1,6 mm/s and 5 mm/s (r.m.s.) selected by the stroke 4,46 mm (Cal) or 14 mm (Meas)
Diameter of test area: 100 mm
Overall dimension (W×D×H): 590 mm × 290 mm × 640 mm
Power supply: 230 V/50 Hz (or 110 V/60 Hz – option US)
Weight: 19 kg
Ask us for special needs.
Norsonic AS
Gunnersbråtan 2
N-3409 Tranby
Norway
+47 32 85 89 00
info@norsonic.com
