Example of applications:

Low Cost application(s):

• Monitoring of noise and action taken immediately if any sound level limit is exceeded
• Reduction of noise nuisance from construction activities using barriers and enclosures, and by using appropriate equipment such as:
  • Hydraulic piling hammers;
  • Hydraulic crushers instead of conventional excavator mounted breakers;
  • Wire saw for concrete cutting rather than excavator mounted breakers
  • Acoustic enclosures for hand-held breakers and generators;
  • Acoustic barriers for large equipment;
  • Plastic chutes for disposal of rubble;
  • Temporary noise reduction solutions (e.g. acoustic insulation) at adjacent noise-sensitive receivers;
  • Silencers, when blasting;
  • Full enclosure to cover the shaft when mucking (removing blasted rock), which can reduce 45dB(A);
  • Noise absorbent materials to wrap around breakers mounted on the excavator
• Use of noise barriers and noise enclosures, as follows:
  • Noise barriers to seal all gaps;
  • Movable noise barriers for noisy construction processes, such as rock breaking, to reduce noise by 5dB(A) in visible areas;
  • Noise enclosures for percussive piling (estimate reduction of 5dB(A));
  • >50mm noise absorbing lining;
  • Triple barrier;
  • 6 meter high noise barriers for rock breaking;
  • Noise barriers along nullahs, pedestrian walkways/streets;
  • Noise barriers on top of hoardings;
  • Noise barriers in recreational areas/open space nearby to reduce noise impact on residents on high floors;
  • Extra-high noise barriers to reduce noise in nearby DSE exam venues
• Vibration monitoring (e.g. use of seismographs (vibro-graphs)) and take action immediately if any vibration limit is exceeded
• Quality Powered Mechanical Equipment (QPME) for excavators and generators
• Measures for percussive piling and silo and concrete batching plants
• Temporary transformer room to reduce use of generators
• Plant and equipment pointed out to sea to minimise noise

Sustainability KPI:

• Trend performance from regular assessment results of noise and vibration level
• Percentage of use of plant and equipment with QPME (%)
• Number of complaints received about noise control, per project (no.)
• Number of times noise control limits exceeded, per project (no.)