Software / Systems Components
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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
