The new Acoustic Calibration Centre (ACC), now accredited by HOKLAS for calibration services

The new Acoustic Calibration Centre (ACC) has been recently accredited in Hong Kong in 2021. 

HOKLAS Accreditation

ACC is now accredited by Hong Kong Accreditation Service (HKAS) under the Hong Kong Laboratory Accreditation Scheme (HOKLAS), which has been mutually recognised by 53 laboratory accreditation bodies (58 accreditation schemes) in 45 economies.

Photo above: Why do you need third-party calibration?

Track Records

Since 2000, ACC has completed more than three hundred calibrations. The most remarkable track record is that ACC has been appointed to design the sound-level meter calibration laboratory for the Environmental Protection Department of HKSAR in consecutive years. 

The State-of-art Calibration System

ACC equips with the state-of-art calibration system – Norsonic NOR1504A – from one of the world’s leading specialist acoustic instrumentation manufacturers. The system assures all the relevant standards to comply with during the testing. The accuracy of our testing and measuring equipment (Norsonic NOR1504A) is regularly tested by the Standard and Calibration Laboratory of HKSAR. The measurement unit of Norsonic NOR1504A is traceable to the International System of Units (SI), stringent and accepted universally. Our acoustic professionals run the test with the standards-complied calibration system to identify any instrument deficiency. 

Photo above: What can our calibration lab do for you?


ACC is the only centre accredited by HOKLAS in Hong Kong eligible to conduct the real-time one-third octave band analyser test. The verification goes after the parameters attenuation in the pass-band 0.1 dB and Attenuation outside the pass-band 1.8 dB specified in IEC 61260:1995, which the test for IEC 61260:1995 is difficult and time-consuming if executed manually. The calibration offer of the real-time one-third octave band analyser makes ACC unique.

Photo above: Calibration standards to comply

Service scopes

As the standards change, ACC has evolved with the refurbished calibration laboratory requirements – superseded IEC651 and IEC 804 by IEC 61672 and IEC61260. We calibrate both sound level meters and calibrators of Classes I and II variations, following a wide range of international standards, including IEC 61672-3 Ed 2.0 (2013), In-house test procedure ESG-Noise-001 against the IEC 61260:1995 requirements, In-house test procedure ESG-Noise-003 concerning IEC 60942 2003 standard. Specific tests or properties measured will be launched according to the HOKLAS’s scope of accreditation. We calibrate sound calibrators, sound measuring instruments such as sound level meters, and sound/octave band analysers of all brands. Our cost-effective calibration services strive to minimise downtime for our customers. The standard turnaround time is seven working days. Prices start from HKD2000 only. A premium five-working-day turnaround service is also available on request (subject to a surcharge).

By: ANewR Consulting Limited, a digital environmental consultant headquartered in Hong Kong since 2008. Our expertise has grown into the context of air and water qualities, noise, green building, waste management, and remediation. With extensive know-how in environmental planning and assessment, feasibility study and policy review, ecological design, monitoring, and audit (EM&A), ANewR has matured to be a leading management consultancy. Standing in the digital transformation reign, ANewR has participated in various environmental digital projects – interactive 3D visualisation, immersive automation virtual environment, Virtual reality, automation system, and monitoring platforms.
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