Nor1527 Impedance Tube
Nor1527 acoustic impedance tube system for measuring sound transmission loss, absorption coefficient, and acoustic impedance of materials per ASTM E-2611, ASTM E-1050, and ISO 10534-2.
Overview
The Nor1527 acoustic impedance tube system is a comprehensive laboratory instrument for measuring the acoustic properties of materials including sound absorption coefficient, acoustic impedance, sound transmission loss, and related parameters. Operating in accordance with ASTM E-2611 (4-Pole Transfer Matrix Method), ASTM E-1050, and ISO 10534-2 (Transfer Function Method), the Nor1527 provides the …
Key Features
- ASTM E-2611 4-Pole Transfer Matrix Method for transmission loss measurement
- ASTM E-1050 and ISO 10534-2 Transfer Function Method for absorption coefficient
- Frequency range 50 Hz to 6400 Hz with dual tube diameters (100 mm and 30 mm)
- Sound transmission loss and characteristic impedance determination
- Sound absorption coefficient and complex reflection coefficient measurement
- Dynamic density and bulk modulus analysis for material characterization
- Johnson-Champoux-Allard-Lafarge (JCAL) poro-elastic material model fitting
- Four GRAS measurement microphones with 10 Hz to 20 kHz range
Applications
- Acoustic material R&D for absorption and barrier product development
- Sound absorption coefficient testing for building and architectural materials
- Transmission loss measurement for noise barriers, panels, and enclosures
- Automotive acoustic material development and supplier qualification
- Aerospace noise control material testing and certification
- HVAC duct lining and silencer material evaluation
Technical Specifications
- Model: Nor1527
- Standards: ASTM E-2611, ASTM E-1050, ISO 10534-2
- Frequency Range: 50 Hz - 6400 Hz
- Large Tube Diameter: 100 mm
- Small Tube Diameter: 30 mm
- Analyzer: 102.4 kS/s, 100 dB, 4-Input/1-Output
- Microphones: GRAS, 10 Hz to 20 kHz, 33 dB(A) to 142 dB
- Power Amplifier: Built-in, 20W
- Data Export: ASCII, MS Excel, MSC Actran
Frequently Asked Questions
- What frequency range can the Nor1527 measure?
The Nor1527 measures from 50 Hz to 6400 Hz using two tube sizes: the 100 mm diameter tube for low-frequency measurements (approximately 50 Hz to 1600 Hz) and the 30 mm tube for high-frequency measurements (approximately 500 Hz to 6400 Hz). The overlapping frequency range allows cross-validation between tubes. - Which standards does the Nor1527 comply with?
The Nor1527 complies with ASTM E-2611 (4-Pole Transfer Matrix Method for transmission loss), ASTM E-1050 (Transfer Function Method for absorption and impedance), and ISO 10534-2 (Transfer Function Method). These are the internationally recognized standards for impedance tube measurements. - What is the JCAL material model and why is it useful?
The Johnson-Champoux-Allard-Lafarge (JCAL) model describes the acoustic behavior of poro-elastic materials using physical parameters including porosity, flow resistivity, tortuosity, and characteristic lengths. The Nor1527 software fits these parameters from measured data, enabling accurate finite element simulation of material performance in complex structures.
Application Guide
The Nor1527 Impedance Tube belongs to the Norsonic Material Testing range. See the Material Testing application guide for system configuration, compatible accessories, and applicable measurement standards.
Why Norsonic?
- Manufactured in Norway — decades of acoustic measurement heritage; all instruments designed and built in Norsonic AS, Lierskogen, Norway
- IEC 61672 Class 1 — highest accuracy class for professional and regulatory acoustic measurement
- International type approvals — PTB (Germany) and LNE (France); accepted by environmental authorities across the region
- 3-year manufacturer warranty — covers parts and labour; Norsonic Asia authorized service center support throughout the region
- Open data formats — .nox files work with NorReview and can be exported to CSV, Excel, and third-party analysis software
Calibration and Compliance
- All Norsonic instruments require periodic IEC 61672-3 calibration — Norsonic Asia provides factory-authorized calibration services with full DANAK-traceable certificates
- Calibration interval: 1 year for ISO 17025 accredited laboratories; 2 years for field instruments in non-accredited applications
- Field calibration check: use an IEC 60942 Class 1 sound calibrator (94 dB or 114 dB) before and after each measurement session
- Loaner instruments available during calibration to minimize project downtime — contact Norsonic Asia for loaner availability
Availability & Regional Support
Available from Norsonic Asia — the factory-authorized distributor for ASEAN, GCC, and South Asia. Instrument supply includes 3-year manufacturer warranty, factory-authorized calibration services, operator training, and after-sales technical support.
- Typical lead time: 3–6 weeks from order confirmation (ex-factory Norway)
- Countries served: Singapore, Malaysia, Thailand, Vietnam, Philippines, Indonesia, UAE, Saudi Arabia, Qatar, Kuwait, India, Bangladesh, Sri Lanka, and more
- Technical support: English and Arabic; response within 1 business day
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