About Us

We provide noise and vibration monitoring solutions to help you meet the monitoring needs of construction projects in an efficient and timely manner.

Construction Noise Monitoring

Noise caused by construction can cause noise pollution to surrounding environment buildings and structure if it is of substantial magnitude. Real-time monitoring of the noise level continuously would ensure that it is within the within the limit prescribed by the National Environment Agency (NEA) - Environmental Pollution Control (Control of Noise at Construction Sites) Regulations

Boundary Noise Monitoring

The objective of the monitoring is to measure the noise emitted from mechanical ventilator fans (air con condenser units) under operative conditions. A computation of noise level will be carried out to estimate noise at a projected distance from the mechanical ventilators. The computation will be based on the standard given by the National Environment Agency (NEA) - Guideline on boundary noise limit for centralised air conditioning and ventilation systems in non-industrial buildings.

Vibration Monitoring

Vibrations caused by construction (e.g. piling activities) can cause structural damage to adjacent buildings and structure if it is of substantial magnitude. The vibration monitoring work is to measure the vibration emitted from the environment or construction works, specifically piling works, or demolition procedures. Pile driving activity causes repetitive vibration pulses. Monitoring of these vibration pulses continuously would ensure if the peak velocity data recorded are within safe limits.

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EPC (CONTROL OF NOISE AT CONSTRUCTION SITES) REGULATIONS (Partial)

Types of Affected Building Maximum permissible noise level for construction sites (Leq 5 mins) in dBA
7am - 7pm 7pm - 10pm 10pm - 7am
(a) Hospitals, schools, homes for aged sick, etc. 75 55 55
(b) Residential buildings less than 150m from site
(i) Mon - Sat 90 70 55
(ii) Sundays & PH 75 55 55
(c) Buildings other than above 90 70 70
Source: http://www.nea.gov.sg/anti-pollution-radiation-protection/noise-pollution-control

Noise Limits Centralised Air Conditioning and Ventilation Systems in Non-Industrial Buildings

Types of Affected Premises Boundary noise limit (reckoned as the equivalent continuous noise level over 15 minutes) in decibels (dBA)
7am - 7pm 7pm - 11pm 11pm - 7am
Noise sensitive premises such as hospital, home for aged sick, library, etc. 60 55 50
Residential premises 65 60 55
Source: http://www.nea.gov.sg/anti-pollution-radiation-protection/noise-pollution-control

DIN 4150, Part 3; Abstract of the guideline values of vibration velocity for evaluation of the effects of short-term vibration

Line No. Type of Structure Vibration Velocity in mm/s
Peak Component Velocity (mm/s) at Foundation for short-term vibration Plane of floor of uppermost storey
Vibration Frequency Frequency Mixture
<10 Hz 10 - 50 Hz 50 - 100 Hz
1 Buildings used for commercial purposes, industrial building of similar design 20 20 to 40 40 to 50 40
2 Dwellings and buildings of similar design and/or use 5 5 to 15 15 to 20 15
3 Structures that, because of their particular sensitivity to vibration, do not correspond to those listed in lines 1 and 2 are of great intrinsic value (e.g. Buildings that are under a preservation orders) 3 3 to 8 8 to 10 8
Peak Particle Velocity: This is the highest instantaneous particle velocity during a given time interval. For measurements are made in 3-axis then the resultant PPV is the: Peak Vector Sum (PVS) - The square root of the summed squares of the maximum velocities.
Structures generally will have a lower response close to their natural frequency (1 - 10Hz), where vibration damage will take effect, if it happens. Therefore, higher limits are acceptable as the wave frequency increases.

References

Some of our clients and completed projects

Sembcorp

Fernvale Link
51 Grange Road
Jurong West Street 65

Seah Gim Wah Construction

3 Brighton Avenue
31 Cotswold Close
35 Thomson Avennue

Ying Soon Kee Trading Company

100 Casuarina Road
112 Farrer Road
723 Upper Changi Road

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