Norsonic Nor1527 Impedance Tube

SKU: Nor1527

The Nor1527 Impedance Tube is an acoustic measurement system used to measure transmission loss and acoustical impedance, or absorption, in materials. It has been designed to be in compliance with standards ASTM E-2611, ASTM E-1050, and ISO 10534-2.

Using two different diameter tubes, 100mm and 30mm the system covers a full measurement range of 50Hz – 6400Hz.

Applications & Standards

Normal Incidence Transmission Loss – ASTM E2611 (4 Pole Transfer Matrix Method) measurement method

Sound Absorption – 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:
NI USB 4431 – 102.4 kS/s, 100 dB, 0.8 Hz AC/DC Coupled, 4-Input/1-Output

Microphones:
¼” GRAS 40PL-10 Measurement Microphones
Freq range: 10 Hz to 20 kHz
Dyn range: 33 dB(A) to 142 dB
Sensitivity: 9 mV/Pa

Includes Calibration Certificates (GRAS Factory Calibration) – Accredited Calibration at Scantek Calibration Laboratory available

Tubes:

Speaker Tube
• Power amplifier: Built-in to speaker tube, 20W, high quality amplifier to power loudspeaker
• 3” 8 ohm speaker
100mm Absorption Measurement Tube
100mm Transmission Loss Tube
30mm Absorption Measurement Tube
30mm Transmission Loss Tube

Calibrator (Optional): Nor1256 Sound Calibrator

Cables: GRAS Ultra-low noise, BNC-BNC cable

Norsonic Nor1527 Impedance Tube

SKU: Nor1527

The Nor1527 Impedance Tube is an acoustic measurement system used to measure transmission loss and acoustical impedance or absorption in materials.