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Sound Level Meter

Room Acoustics Measurements with Nor150

Complete solution for ISO 3382 room acoustics measurements.

Overview

The Nor150 room acoustics measurement solution provides a comprehensive, ISO 3382-compliant system for evaluating the acoustic performance of enclosed spaces. From concert halls and conference centres to classrooms, mosques, and auditoriums, the Nor150 captures impulse responses and calculates the full suite of room acoustic parameters including reverberation time (T20, T30, EDT), clarity indices …

Key Features

  • ISO 3382-1 and ISO 3382-2 compliant room acoustics measurements
  • Reverberation time parameters: T20, T30, EDT with decay curve display
  • Clarity indices C50 and C80 for speech and music evaluation
  • Definition D50 and centre time Ts for detailed acoustic assessment
  • Speech Transmission Index (STI) per IEC 60268-16
  • Built-in signal generator for MLS, sweep, and pink/white noise excitation
  • Multi-position averaging with automatic source-receiver management
  • Impulse response capture from dodecahedron, ORIGAMI, or other sources

Applications

  • Concert hall and performance venue acoustic assessment per ISO 3382-1
  • Classroom and lecture hall speech intelligibility verification
  • Mosque and worship space reverberation and clarity evaluation
  • Conference room and boardroom acoustic design verification
  • Auditorium and theatre acoustic commissioning
  • Hospital and healthcare facility noise and reverberation assessment

Technical Specifications

  • Analyzer: Nor150
  • Standards: ISO 3382-1, ISO 3382-2
  • Parameters: T20, T30, EDT, C50, C80, D50, STI
  • Sources: Dodecahedron, impulse sources

Frequently Asked Questions

  • Which sound sources can be used for room acoustics measurements?
    The Nor150 supports multiple sound sources including the Nor283 dodecahedron loudspeaker for standardized measurements, the Nor286 ORIGAMI impulse source for rapid assessments, and starter pistols or balloon bursts for basic impulse response capture. The built-in signal generator provides MLS, sweep, and noise excitation signals.
  • Is STI measurement included?
    Yes, Speech Transmission Index (STI) can be measured according to IEC 60268-16, providing a single-number rating of speech intelligibility that is essential for classrooms, conference rooms, and public address system evaluation.
  • What is the difference between T20, T30, and EDT?
    T20 and T30 are reverberation time values extrapolated from the -5 to -25 dB and -5 to -35 dB portions of the decay curve respectively. EDT (Early Decay Time) is evaluated from the first 10 dB of decay and correlates better with the subjective perception of reverberation in occupied spaces.

Application Guide

The Room Acoustics Measurements with Nor150 belongs to the Norsonic Sound Level Meter range. See the Sound Level Meter application guide for system configuration, compatible accessories, and applicable measurement standards.

Related Norsonic Products

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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