Westwood Hong & Associates Limited

The professional in acoustic and environmental consultancy.

Celebrating Dual HOKLAS & CNAS Accreditation – Strengthening Your Trust in Our Acoustic Testing Services 

We are thrilled to announce a significant milestone: WESTWOOD HONG & ASSOCIATES LIMITED has been accredited by the Hong Kong Accreditation Service (HKAS) as a HOKLAS Accredited Laboratory. This achievement, combined with our existing China National Accreditation Service (CNAS) certification, marks a historic breakthrough – solidifying our position as a leader in acoustic testing with dual international accreditation.

A 20-Year Journey of Excellence
Since 2004, our Laboratory Manager, Ir K K Iu, has pioneered the design and construction of cutting-edge acoustic testing facilities. In 2015, we obtained CNAS accreditation, and today, with HOKLAS certification, we celebrate two decades of innovation and commitment to precision.

As a unique acoustic testing laboratory with dual HOKLAS and CNAS accreditation, we consistently focus on the 4C core values:
Conformity of quality management systems
Competence in acoustic and vibration testing
Commitment to continual improvement
Customer-centric service excellence

Why This Matters for Your Business
The dual certification is not just an endorsement of our expertise – it empowers your success:
– Globally Recognized Reports: Mutually accepted in
   Mainland China, Hong Kong, Macao, Europe, Australia,
   and 90+ economies under the ilac-MRA scheme.
– One-Stop Compliance: Streamline approvals for
   product noise certifications, building regulations in
   acoustics and environmental noise standards.
– Enhanced Market Credibility: Differentiate your
   products or projects with testing backed by dual
   audited standards.

Testing Scope includes both Laboratory and Field Testing such as:
– Sound Insulation Performance (Rw, STC, OITC, IIC,
   Ln,w, ΔLw)
– Acoustic Absorption (SAA, NRC) and Reverberation
   Time (RT)
– Sound Power Level Testing (Lw)

Gratitude and Forward Vision
This achievement would not be possible without your trust and collaboration. As we embark on this new chapter, we reaffirm our promise to deliver excellent services that elevate your competitiveness and brand reputation.

Proudly serving you with excellence
With 20 years of experience in the field of acoustic testing, we understand the power of testing standards! Let’s connect to discuss how our dual-accredited services can support your projects!


Please feel free to contact our Peter Yu and Fanni Lin.

Hong Kong Tel: +852 2838 2738
Mainland China Tel: +86 752-3919 609
Email: wha@wha.com.hk

CNAS Registration Number: CNAS L8117
HOKLAS Registration Number: HOKLAS 317


Our Services

Building Acoustics and Noise Control

Vibration Analysis and Control

Environmental Impact Assessment

Measurement and Testing