Produkte
Impedanzrohr Nor1527
Nor1527 acoustic performance measurement system is an acoustic impedance, sound transmission loss and sound absorption coefficient measurement system operating in accordance with ASTM E-2611, ASTM E-1050, ISO 10534-2 standards. Measurements can be made at a frequency of 50Hz – 6400 Hz, under room conditions, temperature and pressure. There are 2 different diameter tubes (100 mm, 30 mm diameter) for low and high frequency measurements.
Applications
- ASTM E2611 (4 Pole Transfer Matrix Method) measurement method
- ASTM E1050 and ISO 10534-2 (Transfer Function Method) measurement method
Software
- Determination of sound barrier properties (sound transmission loss, characteristic impedance, characteristic wave number)
- Determination of sound absorbing properties (sound absorption coefficient, complex reflection coefficient, surface impedance)
- Determination of dynamic density and dynamic bulk modulus
- Determination of transfer matrix elements
- Random incidence absorption estimation models
- Tube attenuation removal algorithm for deficient absorptive materials
- Conical adapter correction for transmission loss measurements
- Determination of intrinsic properties with Johnson-Champoux-Allard-Lafarge (JCAL) material model.
(Porosity, Flow Resistivity, Tortuosity, Viscous Characteristic Length, Thermal Characteristic Length, Static Thermal Permeability) - Amplitude and phase calibration of the microphones
- Selectable frequency resolution and number of averages
- ASCII, MS Excel™ export
- Direct export to MSC Actran for poro-elastic materials definition
System Components
- Analyzer:
102.4 kS/s, 100 dB, 0.8 Hz AC/DC Coupled, 4-Input/1-Output - Microphones:
GRAS Measurement Microphones
Freq range: 10 Hz to 20 kHz
Dyn range: 33 dB(A) to 142 dB
Sensitivity: 9 mV/Pa - Tubes:
F-ABS ⌀ 100 mm, 945 mm (L)
LF-STL ⌀ 100 mm, 1130 mm (L)
HF-ABS ⌀ 30mm, 875 mm (L)
HF-STL ⌀ 30 mm, 925 mm (L) - Power Amplifier:
Built-in, 20W, high quality amplifier, to power the loudspeaker in the impedance tube - Speaker: Full Range – 4 ohm
- Cablibrator (Optional): Nor1256 Sound Calibrator
- Cables: Ultra low noise, BNC to 10-32 cables
Features
- ASTM E2611 (4 Pole Transfer Matrix Method) measurement method
- ASTM E1050 and ISO 10534-2 (Transfer Function Method) measurement method
- High-frequency range, 50 - 6400 Hz (100 mm and 30 mm tubes)
- State of art manufacturing
- Industry-leading sensors and analyzer
- Acoustic leakage-proof construction
- One day free online training included