HOKLAS Accredited Laboratory Acoustic Tests for Silencer

 

To provide laboratory acoustic test, including dynamic insertion loss, static insertion loss, airflow generated noise and pressure drop for silencers or silencing products according to the following standards.

 

- ASTM E477 - 20

- BS EN ISO 7235:2009

- GB/T 25516-2010

HOKLAS Accredited Laboratory Airborne Sound Insulation Tests

 

To provide laboratory airborne sound insulation tests according to the following standards for building elements such as, partition walls, curtain walls, acoustic doors, noise barriers and windows etc.

 

- ASTM E90 - 09 (2016)

- ASTM E1332 - 22

- BS EN ISO 10140-2:2021

- BS EN ISO 140-3:1995 + Amd.1:2004

- BS EN 1793-2:2018

- GB/T 19889.3 - 2005

- ISO 140-10:1991

HOKLAS Accredited Laboratory Sound Absorption Tests

 

To provide laboratory sound absorption tests according to the following standards for building elements such as, rockwools, wall linings, fabric panels and ceiling systems etc.

 

- ASTM C423-22

- BS EN ISO 354:2003

- BS EN 1793-1:2017

- GB/T  20247-2006

HOKLAS Accredited Laboratory Ceiling / Raised Floor Attenuation Tests / Flanking Transmission Tests

 

To provide laboratory sound attenuation tests according to the following standards for building elements such as, suspended ceilings and raised floors etc.

 

- ASTM E1414/E1414M-21a (for suspended ceiling only)

- BS EN 20140-9:1994 (ISO 140-9:1985) (for suspended ceiling only)

- BS EN ISO 10848-2:2017 (for suspended ceiling and raised floor / flanking transmission test for facade elements)

HOKLAS Accredited Laboratory Impact Sound Insulation Tests

 

To provide laboratory impact sound insulation tests according to the following standards for building elements such as, floating floor systems and ceiling-floor assemblies etc.

 

- ASTM E492-22

- ASTM E2179-21

- BS EN ISO 10140-3:2021

- BS EN ISO 140-6:1998 / ISO 140-6:1998

- BS EN ISO 140-8:1998 / ISO 140-8:1997

- GB/T 19889.6-2005

- GB/T 19889.8-2006

HOKLAS Accredited Laboratory Rain Impact Noise Test

 

To provide laboratory test of rain impact noise excited by artificial rainfall according to the following standard for building elements such as, roofs, ceilings or skylights etc.

 

- BS EN ISO 140-18:2006

HOKLAS Accredited Laboratory Sound Power Level Test for Ducted AHU

 

To provide laboratory test of sound power level according to the following standard for a ducted Air Handling Unit (AHU).

 

- BS EN ISO 3743-1:1995 & ARI 260-2001

HOKLAS Accredited Laboratory Sound Power Level Tests for Noise Sources

 

To provide laboratory test of sound power level according to the following standard for noise sources such as, machinery, equipment and their sub-assemblies in reverberation chamber.

 

- BS EN ISO 3741:2010

HOKLAS Accredited Field Airborne Sound Insulation Tests

 

To provide field airborne sound insulation tests according to the following standards for building elements such as, walls, doors and windows etc.

 

- ASTM E336-23

- BS EN ISO 140-4:1998

HOKLAS Accredited Field Impact Sound Insulation Tests

 

To provide field impact sound insulation tests according to the following standards for building elements such as, floating floor system etc.

 

- ASTM E1007-04(e1)

- ASTM E1007-21

- BS EN ISO 140-7:1998 / ISO 140-7:1998

HOKLAS Accredited Field Reverberation Time (RT) Tests

 

To provide field measurement of reverberation time (RT) according to the following standard for enclosure such as, classrooms, multi-purpose hall theatre etc.

 

- BS EN ISO 3382-2:2008

HOKLAS Accredited Field Background Noise Tests

 

To provide field noise measurement for different kinds of room in terms of Noise Criteria (NC) or Noise Rating (NR) according to ATS in house method.

 

- In house method ATS-IHM001-NC (in terms of Noise Criteria (NC) / Noise Rating (NR)) 

HOKLAS Accredited Field Rain Impact Noise Tests

 

To provide field measurement of rain impact noise excited by artificial rainfall according to ATS in house method for building elements such as, roofs, ceilings or skylights etc.

 

- In house method ATS-IHM002-RI

Laboratory Sound Power Level Tests

 

To provide laboratory test of determination of the sound power level of a sound source according to the following standard under anechoic or semi-anechoic situation.

 

- BS EN ISO 3745

Laboratory Sound Diffusion Tests

 

To provide laboratory test of measuring of the random-incidence scattering coefficient of surfaces as casued by surface roughness according to the following standard in reverberation chamber.

 

- BS ISO 17497-1

Field Measurement on Acoustics, Noise & Vibration

 

- To provide room sound absorption, room decay rate according to the international standards (ASTM & BS EN ISO Standards);

- Vibration & structural-borne noise measurement according to the international standards;

- Measurement or monitoring of noise and vibration activities, such as tunnel boring, chiller of HVAC system;

- Noise Exposure Assessment in Working Places according to the Factories and Industrial Undertakings (Noise at Work) Regulation of Hong Kong Labor Department.

Room Acoustic Simulation

 

Room acoustics simulation for room acoustics, auditorium acoustics and industrial noise control by using computer software - ODEON.

Prediction of Sound Insulation Performance

 

Prediction of sound insulation performance for walls, floors, ceilings and windows, etc. by using computer software - INSUL

Prediction of Sound Absorptive Performance

 

Prediction of sound absorptive performance for acoustical materials by using computer software - ZORBA.

Acoustic Calculation Tool

 

Acoustical calculation tool for sound transmission loss prediction by using computer software - MINERVA.

Prediction of Sound Insulation

 

Prediction of sound insulation computation in the entire building according to EN ISO 12354 parts 1, 2, 3, 4 and 6 by using computer software - SONarchitect.