Sound Source

Nor279 Impact Ball

Heavy impact ball for low-frequency impact sound testing in building acoustics.

Overview

The Nor279 Impact Ball is a standardized heavy/soft impact source for evaluating low-frequency floor impact sound transmission in buildings. Designed to comply with ISO 16283-2 Annex B and related national standards, the Nor279 simulates the heavy footfall impacts generated by activities such as children running, jumping, or adults walking barefoot, which the standard tapping machine does not adeq…

Key Features

ISO 16283-2 Annex B compliant heavy impact source
2.5 kg hollow rubber sphere for standardized impacts
Controlled 1.0 m standard drop height
Low-frequency excitation below 100 Hz
Reproducible and repeatable impact characteristics
Carrying case included for field portability
No electronics or power required for maintenance-free operation

Applications

Heavy impact sound testing per ISO 16283-2 Annex B
Low-frequency floor performance evaluation
Residential building pre-completion qualification
Building code compliance for impact sound ratings
Floor covering and floating floor evaluation
Lightweight construction impact assessment

Technical Specifications

Standards: ISO 16283-2 Annex B
Mass: 2.5 kg
Drop Height: 1.0 m standard
Material: Hollow rubber sphere

Frequently Asked Questions

When should I use the impact ball instead of the tapping machine?
The impact ball is used for heavy/soft impact testing per ISO 16283-2 Annex B, while the tapping machine tests standard footfall. Many specifications and building codes now require both tests for comprehensive floor assessment, particularly for lightweight constructions.
What is the drop height requirement?
Standard drop height is 1.0 meter from the bottom of the ball to the floor surface, as specified in ISO 16283-2 Annex B.
Is special equipment needed to use the impact ball?
No, the impact ball is manually dropped from the specified height. Measurements are taken with a standard sound level meter or analyser in the receiving room below.

Application Guide

The Nor279 Impact Ball belongs to the Norsonic Sound Source range. See the Sound Source application guide for system configuration, compatible accessories, and applicable measurement standards.

Related Norsonic Products

Nor277 Tapping Machine — Standard tapping machine for impact noise measurements in building acoustics tes…
Nor283 Dodecahedron Loudspeaker — Omnidirectional dodecahedron loudspeaker for building acoustics and room acousti…

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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