Nor283 Dodecahedron Loudspeaker
Omnidirectional dodecahedron loudspeaker for building acoustics and room acoustics measurements.
Overview
The Nor283 Dodecahedron Loudspeaker is a professional omnidirectional sound source engineered for building acoustics, room acoustics, and sound insulation measurements in accordance with ISO 10140, ISO 16283, and ISO 3382. Its twelve-sided geometric design houses multiple loudspeaker drivers that radiate sound uniformly in all directions, satisfying the strict directivity requirements specified in…
Key Features
- Omnidirectional sound radiation meeting ISO directivity requirements
- ISO 10140, ISO 16283, and ISO 3382 compliant
- High sound power output exceeding 110 dB
- Wide frequency range from 100 Hz to 5 kHz
- Durable construction for daily field use
- Tripod mountable for standard measurement heights
- 8-ohm impedance for compatibility with professional amplifiers
Applications
- Airborne sound insulation testing per ISO 16283-1
- Room acoustics measurements per ISO 3382
- Reverberation time measurement (T20, T30, EDT)
- Sound insulation testing per ISO 10140
- Facade sound insulation testing per ISO 16283-3
- Sound power determination per ISO 3741
Technical Specifications
- Standards: ISO 10140, ISO 16283, ISO 3382
- Frequency Range: 100 Hz – 5 kHz
- Sound Power: > 110 dB
- Directivity: Omnidirectional
- Impedance: 8 ohms
- Weight: 15 kg
Frequently Asked Questions
- Why use a dodecahedron loudspeaker?
The 12-sided design ensures omnidirectional sound radiation, which is required by ISO standards for building and room acoustics measurements. This uniform directivity guarantees consistent excitation regardless of the loudspeaker's orientation in the source room. - Which amplifier should I use with the Nor283?
The Nor280 power amplifier (200 W) is recommended for standard applications, while the Nor282 compact amplifier (100 W) is ideal for portable field use. Both include built-in noise generators for complete measurement capability. - What is the maximum sound power output?
The Nor283 can produce over 110 dB sound power level when driven by a suitable amplifier, providing adequate signal-to-noise ratio for testing even well-insulated partitions.
Application Guide
The Nor283 Dodecahedron Loudspeaker belongs to the Norsonic Sound Source range. See the Sound Source application guide for system configuration, compatible accessories, and applicable measurement standards.
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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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