Acoustic Calibration Centre

A HOKLAS-accredited Acoustics Laboratory in Hong Kong

The Acoustic Calibration Centre (ACC302) has been accredited by Hong Kong Accreditation Service (HKAS) under the Hong Kong Laboratory Accreditation Scheme (HOKLAS) since 2021. The ACC is the only laboratory HOKLAS-accredited to conduct real-time one-third octave band analyser test. We provide calibration services for sound level meters, calibrators and real-time one third octave band analyzer with HOKLAS Certificate of Calibration. 

Accredited Calibration Services

Sound Level Meter

Calibration for the following parameters in accordance with IEC 61672-3: 2013 Cl. 11.2, 13, 14, 15, 16, 17, 18, 19, 20 and 21.

  • Self-generated noise with microphone replaced by the electrical input signal device
  • Electrical signal tests of frequency weightings
  • Frequency and time weightings at 1 kHz
  • Long-term Stability
  • Level linearity on the reference level range
  • Level linearity including the level range control
  • Toneburst response
  • C-weighted peak sound level
  • Overload indication
  • High-level stability

Sound Calibrator

Calibration for the following parameters using insert voltage technique in accordance with IEC 60942: 2003 Annex B.

  • Sound pressure level
  • Frequency accuracy
  • Total distortion

Real-time one third octave band analyzer

Calibration for the following parameters in accordance with IEC 61260: 1995 Cl. 4.4 and 5.3.

  • Attenuation in the pass-band
  • Attenuation outside the pass-band

Contact us for details on prices and delivery times. We recommend that you contact us before sending equipment to us to keep the time you’re without your equipment at a minimum. 

By Practitioners

We invite professionals from different industries to share their insights and experiences to our learners. 


Multiple languages available, including English, Cantonese, Mandarin and Japanese, etc. 


Certificate of Attendance and Certificate of Completion will be available for some courses upon the completion. 

Interested in our services?

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